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<br />150
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<br />REPQRT OF AN EXPEDITION 'DOWN THE
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<br />Severn] specimen~ of this specics were collected by Dr. 'Woodhouse
<br />Zuni liver.
<br />'.,1 I' ", ,',. < '. ." .
<br />'Fig: lrepJ~sents tjJefi.sh reduced oJl\l-]mlf the natural size.. "", '<,~"
<br />Fill" 2, l1ead,yielYlld fraIl) abov~, showil!g the situ!ltioll, Qf th.e ~yes anilIl,Qst~i)." '
<br />, Fig. 3, head frol)l below, showing the slllLpe of the fl)outh f1l1q ~r~J1cp'ipli\e~,a"I:
<br />
<br />appuatus. '. '", . . ' . .,., ' ", ',(, ";:~/
<br />Fig. '4, enlarged s;""ale from the l~ter;L1 line.. " , " ."-' ,
<br />Fjg.. 5, enlarg~Jl Bcale from the middle of the ~a"k.
<br />Fig. 6, eularged scale from the holly. '
<br />Figs. 4, 5, and 6 are magnified under the
<br />exac~ proportioll of the ditTerent scnles.
<br />. ..'
<br />
<br />','
<br />
<br />"'. I
<br />same diaf~~ter, thu~~re~~n:i_llg:pi~
<br />. .' -'. '. -':' ' .' . -' .~<..
<br />
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<br />
<br />2. GII.A r.lI::G.\:-/'s, B. and G. Fishes, rr. H.
<br />
<br />SL'f:C. CIl.ul.-Body .,'ery slender; tail very mllch attrinuated; fins Very';n!1ch
<br />developed; scales sub-elliptical, narrowing slighUy posteriorly." . " 'L.,7'
<br />SVN,-GiI.. cle~cllls, 'B. and G., Pree. _<\ead.1'fu.L Sc.. Phil~" VI., IB5~~'369;,
<br />The present specieij is very closely allied to the preceding one., wl,icbit "resem:.'
<br />hIe" in the gel1eral c~nliguratiori of th~ ltead, body, and fins,', ll1;:mo~~'8tr~king_
<br />peculiarity consists in its more :41lringated llml more slender body, 1U,1d . espe~iallf
<br />in its mo'reslenf,!er tail'l!-nd lUore develollcd caudal, which is likewise 1119,~.e 4t;aply,
<br />emllfginll~ed.' 't~deed, '~ll ,the fins are liroportionaIlY'!lor~M:veilipe?)':;TI1~
<br />specim~ribeforous ipleiuly 12 inches ]OI;g, the head forin,iDg\~efin~flq~~ilip..~,
<br />length. Theg'rellte6t depth of the !JoQY, in adl'RDce of th~ dorsal, e~~erils~ve{l'
<br />times if) tho total length. The greatest thiclmess i& a~outtliehalrof UJe ~ep.t1i. ~
<br />The, head is very muchdel'ressed a,ild flattened on the snout;.' Th~ eYl!!> il.r~.'
<br />elliptical; their dian;et~r'entering seven til110S in the, length of ,the .side.of (~e
<br />head, ~nd twice 'in th~ distance betw.een the end of the snout,iwdthe Ilnterio~,
<br />rim ~f theorbil., The n~stri]sare situated entirely on theuppe';~urf;icp of t~~
<br />snout, nearer to the eye than to the extreJUity or'thel~tter. . The mqut.1Jis:ip-
<br />fllrior. the 1I11)ler jaw' overlapping \.I&e lower; tbe posterior' extremi'ty" of l~~ '
<br />maxillary exteuding to a'vertical line, l'ussillg in advance of. the ,orb\t;thllt ,.is,
<br />not (Iuite as farho.ek .as in the Preceding specie~. Th~ isthmlls Isverv.'sp.lan,
<br />measuring only three-si.xteelL\.hs of an inch. '. ,,' ,,':,:,\,.' ':..'" ..
<br />The son rays in aU tho fins IlIive the same genernl strtlclllre as"ih thepreeid-
<br />jng species; in the do'rsa! n,;,d anal they .are prec,ededby thrc~ l'l!di~entary spinlll! '
<br />instead of one. The I!lIInlocr of the Ta)'s is somewh!'t ditferelLl, Ils~h()wn in: the
<br />f",I1owjng formu]a: , . ."", '.. .
<br />Hr. 3. 3; D Ul. 9; G 9. I. 9.'9. J. 10; A IlLIO;:V 9;P 16,;
<br />The scales diffcr from those of the preceding sjJeci'es in bei,ng n;ore elongated',
<br />sub-el1iptjcal,unt~riorly brQadcr than posteriorly. The !aterlllline !ssimill\r'in
<br />hoth species. ' . '." , ,\.
<br />The color is nnifl;.rm reddi~h hn,\\'n ah'j\'e, >ilvcry )'eUow beneath i, tlie fin,S
<br />~re d"U yellO\v. , . "
<br />On!! specimCli was collectcd hy Ur. '\\'uodl!ull.c in the ZUlii river:'
<br />
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<br />!~:U~I Al'iD ~OJ.QRAPP ~VEItS,
<br />
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<br />
<br />'t~F:ig.l represen~~ this speciilB in profil~ ell!l~half it~ natmal si~e,
<br />;.' Fig. 2) th\! he~d fr~l~ above:; the eyes are but slightly visible.. , '
<br />'..':'.-rrg.;3.-tlle,he,ad fr.o~l below, showing part orthe eyes, mouth, and bruncllioi-
<br />tegalappar;Ltus.:,'. ..' '. ,: . '
<br />",r/Fig. 4. enlarged;s&~le fro.lt 'the laleralline.
<br />.~ . , ,
<br />. '. 'Fill" 5, eJjI~rg~d "cale r,om L1,.e bllck.
<br />Fig. 6, enla.rged' "cale (rp~ tb~ belly. ,
<br />Figs. 4, 5'. "n~..6.'~ndc~ lhe 8llme l}lagnilyi~lgpolVer.
<br />
<br />,Gli.~ GI\"lCIL1S, B. 'lId G. 'Fi~h~s.'pi.m.
<br />
<br />SPEc. C1UR.~Body' nearly fusi.limn; healI nearly conical; scale:; flub-circular;'
<br />eyes proIJortiolllilly large.' . . . .
<br />SVN.-Gil.. gr~cili3. ~'JL~d G.o-Proc. Acad. Nal.~~., Phila., VI. 1853;' 3G9.
<br />
<br />Genera) shape subcfusiform; hody compressed. TQtal ICflgth, four and a '1un.r-
<br />tllr inchcs. Greatest 4epth iFJ1mediately in adv~ce of the dorsal fin, one irich,
<br />cOlltain~dnearly' .five times and a half in the, length, The grentest thickness
<br />at the, origin ,of the bo~yis five 'eighths orall inch :i~s relation to the depth Is lIS
<br />5 t~ B,and is compI'i.e4 ilight times and a half"i11 th~ ICligth. ' .
<br />" rhe head is suh-quad'rangula.rly conicaI', i~ry~\ightly depres.~e'd ahove; meas, ,
<br />ured froplsn~ut to p~sterio~ ITI~rgin~f p're~perculun~dt forms one-fourtl.. of the
<br />, . total Iengtli;and frol)l ~nol\t to}tape i( enlli;' in it alnlpstsi~ tinle., Theeyes
<br />,,~ ' a~~ pr~Portioua!I'y I~r~?:~d 'sllb~:circll!a,r.';~I~eir longi~4din~l'dia1l1eter being e~n-
<br />. tamed fqur tii\\,es in tile length of the' side of. the head, from the S'lOut to the
<br />posterior margin,ofthe'JircopercuILl~\. 'Tl1e'n!>~trils, 5ituat~d toward. 'ihe upper
<br />surface of the! head. iue much ne'arar,to the 'o'i-hit thall to the tip of the' srio1i~. ,
<br />iUpp'er jaw ove~l.llps'll.e tip of the low~rone; the 1'08t,erior extremity of the max-
<br />iIl~ry ext!lnds sli!rhtly beyond a 'peTpeitd,i~ul\lr lin,e, whlch1"ould pass j'n. advance
<br />lifLlJe orhit. Bra:nchit;'stegal rays three,: v~ry iJtueh' flattened and, Closely COl~l-
<br />bined in their melpbrane; The gill openings'a're I'ropoftionaUYlarge, separated
<br />undern~a.thbyan' isthmus of three-sixte~ntlis'of ~11 inch. Serie~ of njUCOUS
<br />pore~ may be traced from the origin of the' lateral line lL!:ro~s ~he nnpe, hence te
<br />the tfostrils along the lIarieta!.region; . also 'dQwnwardsulong the preo'perculuni
<br />to the angle of the mouth. and under the' orbit towa'rait'hri ~nolll. '. , -
<br />The dorsal fif\,a little high~r than long, is situated exahtly on .the middle of
<br />t/1e back i it~ upper m;rl!'iJi'is slightly concave;' ,J(is colriposed of eight ~ft ~nd
<br />'bifurcated rays (the Inst one being double frolll its base,) an~ of three spiny
<br />ones. the first pf which vei]' short llnd rudimentary-the two others, extendin'g
<br />beyond tha middle, of L11e' anterior, soft. The e'ight soft rny. ar~ bifuron ted frolll
<br />.' thc ';'iddle, and again from the two.thirds of lheir.l,ength; the' last. is to the
<br />longest as 2 i. to 5. The caudal fin is posteri~r1y deeply Eilllarginated, the upper
<br />and 10IVer lobes equal, lherays being likewise twice bii'u'i-cate'd on their !en~h.
<br />It ii composed of twenty-three rays and-fifteen rndilllcnts, eight of them above
<br />and seven helow. The anal resembkllthe 'dorsal in shape and proportions, being
<br />slightly convex exteriorly Ilnd higher than long. It i.likewise composcd of eight
<br />tioft, twice, hifurcated rays, and three anterior spines'. It. anterior bn"a~H1argin
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