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<br />190 Bailey and Cross
<br />Brandt, as fail- Shaped, each with –9 or 3 points (Ber;, '9;;?: 57, 69_
<br />70). It would appear, then, that modification from simple to dichot-
<br />omous gillrakers has occurred along two or more independent Hnes
<br />in the Ac-inenseridae. S. platorynchus is interpreted as the most
<br />high] -,- specialized species in the family in this character.
<br />Color.— \either species shows any noteworthy- color pa t to °n. T1,,,
<br />basic ground color in platorynchus, at least, is subject to considerahlo
<br />variation, determined in part by turbidity- and probabl i v by other
<br />environmental factors. It is doubtful whether dark individuals of
<br />album and light ones of platorynchus could be separated on the basis
<br />of color. ';evertheless, album is usuall much lighter, a grayish
<br />white, and platorynchus varies from light to rather 'r74: ' —,wn.
<br />Whcn the .species have been taken together we h: ;
<br />pendently found that album is more pallid, as was reported i,, x uroes
<br />and Richardson (1900.
<br />Scaphirhynchus platorynchus (Rafinesque)
<br />Shovelnose Sturgeon
<br />Accipenser platyrhincho.— Rafinesque, 1813: 354 (nomen nudum).
<br />Accipenser platoryrwhus.— Rafinesque, 1830: 30 (original descripti(,r.: Wa-
<br />bash. and Cumberland rivers, seldom reaching as high as Pittsburgh; also
<br />in Mississippi and _Missouri rivers). Kirtland, 1838: 170, 196 (.Ohio Ri%--- .
<br />Acipenser platoryruhus.— Storer, 1846: 349 (characters; Ohio River,. Kirtland.
<br />1847: 35 -36, pl. 8 (characters; length 1 -8 feet; Ohio River, Cincinnati:.
<br />Scaphirhynchus platirhynchus. --- Girard, 1858: 357 (characters; syn
<br />souri River and near mouth of Poteau River).
<br />Scaphyrhynchops platyrhynchus.— Hayden, 1863: 178 (upper --Mi >-
<br />Goode, 1879: 65 (Ohio River; Madison, Indiana). Hobbs, issi: i -:5 Malls
<br />of Ohio River).
<br />Scaphirhynchus platyrhyruhus.— Dumeril, 1870: 368 -271 (characters; synonymy;
<br />distribution). _Meek, 1889: 164 (characters; larger streams in Iowa % Kirsch
<br />and Fordice, 1890: 346 -347 (characters; synonymy; distribution Meek.
<br />1893: 34 331 (Iona records: Mississippi River; Cedar Riv –
<br />at Cedar Rapidsl; Jissouri River, Sioux City). Bean, 1893:.; -
<br />distribution; common in western Pennsylvania). Evermann i.
<br />1894: 96, pl. 10 (compiled records). Eigenmann and Beeson. 1-,,94: 18
<br />(Indiana records compiled: Ohio River; «abash River, Terre Haute Eigen-
<br />mann, 1894: 119 (presumptive record for Winnipeg— probably erroneous;.
<br />Berg, 1904: 67 (characters; monoty -pic). Jordan, 1905: 356 (compiled!.
<br />Scaphirhynchopa platyrhynchus. —Cope and Yarrow, 1875: 639 (Rio Grande near
<br />Albuquerque— specimens reexamined by us). Nelson. 1876: 51 1
<br />_Mississippi rivers). Jordan and Copeland. 1576: 161 kScaphirh -r,•
<br />
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