124 NEW YORK STATE MUSEUM 



8emotUus cw^poralis Cope, Jour. Am. Phil. Soc. XIII, 362, pi. 10, fig. 2, 

 (tlie separate), 1866; Jobdan & Gilbert, Bull. 16, U. S. Nat. Mus. 221, 

 1883; GooDE, Fish. & Fish. Ind. U. S. pi. 228, lower figure, 1884,. 



Leucosomus corporaUs Guntheb, Cat. Fish. Brit. Mus. VII, 269, 1868. 



Semotilus atromaculatus Bicknell & Dbesslab, Proc. Ac. Nat. Sci. Phila. 

 16, 1885; Bean, Fishes Penna. 51, 1893; Jobdan & Evebmann, Bull. 

 47, U. S. Nat. Mus. 222, 1896; pi. XD, fig. 100, 1900. 



The chub has a slender and moderately elongate body, its 

 greatest hight immediately in front of the ventrals, about equal 

 to j:he length of the head without the snout and contained from 

 four to nearly five times in the total length without the caudal. 

 The greatest thickness of the body is about two thirds of its 

 greatest hight. The head is thicker than the body and rather 

 short with an obtuse and moderately declivous snout, whose 

 length is about two sevenths of that of the head and consider- 

 ably greater than the diameter of the eye. The eye is rather 

 small, placed high, its diameter nearly one fifth of the length of 

 the head and scarcely more than one half of the space between 

 the eyes. The mouth is moderate, very slightly oblique, the 

 jaws subequal or the lower slightly included; the end of the 

 maxilla reaches very slightly past the vertical through the front 

 of the eye. Maxillary barbel not evident in this example, 

 though usually present in large individuals. The lateral line is 

 abruptly bent downward over the first half of the pectoral, 

 straight and nearly median during the rest of its course. The 

 origin of the dorsal is over the 27th scale of the lateral line, 

 and the ventral origin is under the 24th scale. The length of 

 the dorsal base equals the combined length of the eye and snout. 

 The first divided ray is the longest; its length two thirds that 

 of the head. The last ray is one half as long as the longest. 

 The ventral does not reach to the vent; its length scarcely 

 greater than the postorbital part of the head. The anal origin 

 is under the 37th scale of the lateral line; the length of the anal 

 base is a little more than one third that of the head, and the 

 longest anal ray equals the postorbital part of the head. The 

 tail is rather slender, the least depth of the caudal peduncle 

 equaling one half the greatest depth and the distance of the 

 anal from the origin of the middle caudal rays nearly equal to 



