56. r.Kuciscus. 2;i9 



79. Leuciscus tuditanus. 



Hybopsis tuditanus, Cope, Jauni. Ac. Nat. Sc. PhiUid. xiii. p. 381. 



L. lat. 43. Seven longitudinal scries of scales above the lateral 

 line, and four between it and the ventral fin. The height of the 

 body is contained five times and one-third in the total length (with- 

 out caudal), the length of the head four times and one-half; the 

 diameter of the eye is two-sevenths of the length of the head. 

 Head broad and flat ; temporal (region angulated ; snout very thick 

 and obtuse ; mouth very small, inferior. Origin of the dorsal fin 

 conspicuously nearer to the root of the caudal than to the end of 

 the snout. Pectoral fins not reaching ventrals. Sometimes a dark 

 longitudinal band 021 the side ; a dark spot on the middle of the 

 anterior dorsal rays, and a faint one on the base of the caudal. 

 {Cope.) 



Pharyngeal teeth 4 — 4. 



Detroit and Wabash Pivers. 



80. Leuciscus hsematurus. 



Ilybopsis hoematurus, Cojoe, Journ. Ac. Nat. Sc. Philad. xiii. p. 882, 

 *pl. 12. fig. 4. 



D. 9. A. 8. L. lat. 44. L transv. 7/?. 



The height of the body is about one-fifth of the total length 

 (without caudal), the length of the head one-fourth ; the diameter 

 of the eye is two-sevenths of the length of the head. Snout little 

 obtuse ; mouth moderate, slightly oblique, terminal. Origin of the 

 dorsal fin a little in advance of that of the ventral, midway between 

 the end of the snout and the root of the caudal. Pectorals ter- 

 minating at a great distance from the ventral. There are four 

 (according to the figure, three) longitudinal series of scales between 

 the lateral line and ventral fin. Tail red ; a spot at the root of the 

 caudal. 



Pharyngeal teeth 4 — 4. {Cope.) 



Michigan. 



SI. Leuciscus lineolatus. 

 ? Alburnus lineolatus, Agassiz. 



D. 9. A. 8. V. 8. L. lat. 34. L. transv. 5i/o. 

 The height of the body is two-ninths of the total length (witliout 

 caudal), the length of the head one-fom'th. Free portion of the tail 

 twice as long as deep. Head rather low. Eye rather large, its 

 diameter being somewhat less than one-third of the length of the 

 head, a little more than that of the snout, and equal to the width of 

 the interorbital space. Snout somewhat convex, slightly overlapping 

 the lower jaw ; cleft of the mouth of moderate Avidth, not extending 

 to beloAV the front margin of the eye. Prajorbital about as deep as- 

 long, much larger than the postorbital, which is a little wider than 

 . the preceding suborbital. Origin of the dorsal fin opposite to that of 

 the ventrals. :in(l midway between the end of the snout and the root of 



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