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<br />368
<br />?JL'NE,
<br />Xolice of the Hya nodulosa, Wood.
<br />By ISAAC Lsit.
<br />In the examination of the Jfolluses of the Imperial Cabinet of Vienna, i
<br />observed a specimen of the family Aaiade,,, which I immediately recognized to
<br />be the .11ya nodulosa, described and figured by Rood (General Conchology and
<br />Index Testaceorum), and which was placed by me among the nodulous Uaione.r
<br />in my Synopsis.
<br />The form, thickness and nodulous character of this shell, is so much like
<br />that of Uaio auatulosus, Ilobis, that it has been thought to be the same. I gave
<br />it a distinct place in my Synopsis (Ed. 3d, p. 22) with a note doubting it to be
<br />an a{ ?American species," meaning North America. The locality was unknown
<br />to 11r. Wood; and Mr. Tradnfeld, the able zoologist, under whose charge this
<br />department of the Museum is placed, is entirely ignorant from whence the spe-
<br />c
<br />imen was received, it having been in the establishment during the period of
<br />the
<br />fu relate , nei her of heetwo kdnuriinistratioU an
<br />specimens c nr be traced to their habitat. *chThe
<br />Inspection of the specimen, however, enabled me at once to place the species
<br />in its proper poSitioo in the system, the teeth, particularly, the lateral ones,
<br />having equal and par.alie) striae as in the genus Pre'godon, Schum, ? Cdslaha.
<br />Lam. The cardinal anti lateral teeth are both robust, and of the form of the
<br />ponderous subrotund Uniones, but the deeply impressed striae separate it tram
<br />that genus and place it in Priaodon. When Schumaker proposed his genus
<br />Priaodon, and Lamarck that of Caacalia for the same shell afterwards, there was'
<br />but one species known. It is true that D'Orbigny proposed two others, quadri-
<br />latera and inflato, but i recognize these only as variations. The genus Prisodwl
<br />will now, if I be correct in my inductions, consist of three distinct species, each
<br />one belonging to a well characterized group, viz.: the plicate, nodulous and
<br />smooth divisions, and they will stand in the following order:
<br />(Plicate,) Prisodon truncates, Set) Jim. = Castalia ambigua, Lam.
<br />(Smooth.) Prisodon Duprei, Lea = Castalia Duprei, Recluz.
<br />(Nodulous.) Prisodon nodulosus, Lea - 11ra nodulosa, Wood,
<br />The Committee on Prof. Baird and Air. Girard's descriptions of
<br />new Fishes from the river Zuni, reported in favor of publication.
<br />N Descriptions of some nem Fishes from the Niver
<br />By S. F. BAIan and CII..... GIRARD.
<br />.. The species of fishes here described as new, were caught in the 7.1101 River,
<br />New Mexico, by Dr. S. W. Woodhouse, while attached as Surgeon and Ant and
<br />ralist to the expedition of Capt. Seetgreaves, for the exploration of Zuai
<br />d
<br />its tributaries. Full description with figures will be shortly published in the
<br />official report of CApt. Sitgreaves.
<br />They belong to the Cyprinoid family, and constitute a new genus which we
<br />propose to .
<br />to
<br />GII, 1.
<br />haracterized by its subfusiform and compressed body, its more or less arched
<br />back, especially in large individuals, and by its extreme it tteauation posteriorly.
<br />The peduocte of the tail is rather alender. The head is much depressed, pro-
<br />portionally small, its upper outline concave, and its Sno
<br />cular or elliptical. The mouth is small ut elongated. Eyes depressed, cir-
<br />rally overlapping the lower, or of medium size, the upper jaw gene-
<br />, Sa as to conceal its cleft from above. No barbels
<br />or rudiments of barbels at the angle of the mouth. Pharyngeal teeth oblique,
<br />compressed, disposed on two rows with their tip slightly hooked. Branchial
<br />* The specimen has the fine nacre of the South American .1aaudrs, and [ flat, e
<br />j? little doubt but that it inhabits the same country with the other two species.
<br />P,-b v"4 .?3 sc,' to
<br />°? ?/? loQ/-icy- l v. j
<br />1853.] 369
<br />arches four on each aide. Bronchiostegal rays six in number, three' on either
<br />side. Scales varying in size according to the regions; small and not imbri-
<br />cated on the back, large and imbricated on the flanks, and of medium size on
<br />the belly and tail. Lateral line well marked, forming an open curve on the
<br />abdomen and straight on the tail. Caudal fin forked or crescentic, generally
<br />onicolor; the tints of the back, flanks and abdomen merely varying in totensity.
<br />1. GILA nOnUBTA, B. and G. Body very much swollen anteriorly, and taper-
<br />ing very suddenly tram the dorsal On to the insertion of the caudal. Ilead very
<br />much depres=ed above, sloping very rapidly from the nape to the snout and
<br />forming one fourth of the entire length. Eyes proportionally small and sub.
<br />circular. Mouth tolerably large; the posterior branch of the maxillary does
<br />not reach the vertical line of the pupil. Dorsal fin situated on the middle of
<br />the back, and a little higher then long. Caudal crescentic. Anal situated
<br />behind the dorsal. Inset tion of ventrals in advance of the anterior margin of
<br />the dorsal. The posterior tip of the pectorals dues nut reach the insertion of
<br />the ventrals. All the soft rays are bifurcated. Lateral line composed of about
<br />ninety scales. Color greyish brown above, lighter beneath.
<br />Formula of the fins: DI.I9.C8.L8.9.L7..AL9.VI.9.P 15.
<br />8. GILA aLEnAUs, B. and G. Closely allied to the preceding eliecies. Its
<br />body, however, is more slender, and its tail proportionally- more elongated.
<br />The caudal fin is more deeply emarginate and more developed, as indeed are all
<br />the fins. The head is very much depressed and flattened on the snout. Eyes
<br />elliptical. The scales are proportionally more elongated than in the preceding
<br />species and are broader anteriorly than posteriorly; the lateral line hate about
<br />ninety of them. The number of rays in the fins affords also a distinctive mark
<br />between Loth species. The, ventrals have no rudiment of spiny ray. Color
<br />light brown.
<br />Fin rays: DIll. 9.C9.1.9.9,1.10.AI11.10.V9.P.16.
<br />3. GtL& ounctc.ts, B. and G• This species is proportionally shorter, deeper,
<br />and more compressed than its congeners. It reminds us in shape at,d general
<br />appearance, of the'tShiner" (Letrciacus ornericanus). Both the dursal and lintel
<br />fins are provided anteriorly, as in G. eleyons, with three rudimentary spiny
<br />rays. The scales are rather small, very thin ; here are from 80 to 90 of them
<br />in the lateral line. The relative position of Elie fins is the same as in he other
<br />species of this genus. Color yellowish brown.
<br />Finrays : D111.8.C.8.1, 11.1.7. A Ill. 8. V 1. 8. P. 16.
<br />The Committee ou Dlr. Cassin's " Catalogue of the Hirundinid:e in
<br />the Collection of the Academy," reported to favor of publication in
<br />the Proceedings. (lam. See end of this .number).
<br />The Comtittee on Mr. Casaiu's descriptions of new Swallows and
<br />Parrots in the Collection of the Acadenty, reported in, favor of pub-
<br />lication.
<br />Deacrihlions of ntr species of Dirundiai he and Paillacidre, speoirnens of tehich ore
<br />in the coueetion of rhe,Aeademy of Natural Sciences kf 1'hiladel, his.
<br />By Jour Cassia.
<br />i. 111RUNDI`s;IDA.
<br />1. Cyidruus syuASIATUS, n4is.
<br />Farm. About the size and general form of C. arnbroaiacus and C. parrua.
<br />Bill rather broad at base, curved, wiogs and tail long, the latter forked, toes,
<br />and claws strong.
<br />1lirneeuions. Total length (of skin), from tip of bill to end of toil, about 5
<br />Inches.
<br />Colors. Entire plumage of upper parts greenish black with a slight greenish
<br />7:A -r 1
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