1870,] 4od [Cope. 



inclies. Locality not well ascertained, but as it accom]oaniecl species of 

 Bubaliclitbys, it is probably from one of tbe Avestern States. 



Dedicated to my friend, Dr. Jobn Edw. Gray, for many years tbe ener- 

 getic director of tbe zoological department of Britisb Museum. 



Carpiodes tliompsoni, Agass. 



Amer. Journ. Sci. Arts, XIX 75. Caiostomus cyprinus Thompson, 

 Nat. Hist. Vermont. ScUrognatJms cyprinus pas Kirtland, Fishes of 

 Ohio, Proc. Bost. N. H. Soc. V. 275. 



This is perhaps the liandsomest species of tbe genus, and is distinguished 

 by its stout form, numerous narrowly exposed scales, and little elevated 

 dorsal fin. Tbe eye is small, entering the length of tbe bead 5.2 times, 

 and 2.2 times the interorbital width. The muzzle is more elongate, but 

 not so conic as in the two species last described, and projects far beyond 

 the nasal crests, having an obliquely truncate profile. Hence tbe end of 

 symphysis mandibuli is much in advance of the line of the nares, and the 

 rim of the upper lip just reaches the line of tbe orbit. 



Dorsal line much arched, oiigin of fust dorsal radii midway between 

 end of muzzle and origin of tail. Scales 8 — 41 — 0. V. 10, A. VII. Oper- 

 culuiu flat, slightly ridged. Length averaging a foot. Color silvery, with 

 a, greenish golden band along the middle of each of tbe series of scales 

 near tbe dorsal region, producing longitudinal golden bands. 



Specimens from Lake George and Saginaw Bay, Luke Huron. 



, Carpiodes iison, Agass. 



Amer. Journ. Sci. Arts, XVII, 356. 



Tbe original description of this species is rather too brief to allow of a 

 perfectly satisfactory determination of my specimens. These are from the 

 "Wabash, in Tennessee ; those described by Prof. Agassiz are from the 

 Osage, in Missouri. 



This species has the general form of the buffalo fish, but has not so 

 elevated a dorsal outline. It is therefore, much less elevated than the 

 Carpiodes above described. It is especially characterized by the elongate 

 form of the muzzle, in which it exceeds any other species of the genus. 

 The profile descends obliquely posteriorly from tbe end of the muzzle to 

 the mouth, and tbe end of the mandible is but little in advance of the 

 nares, while the canthus is in line with tbe anterior limb of the orbit. 

 The lips are well developed for the genus, and delicately longitudinally 

 plicate. The eye is large, tbe middle line of the cranium falling within its 

 posterior rim ; in other species it falls posterior to this point. Its dianre- 

 ter enters the Jengtli of the bead 4.5 times, and the interorbital width, 

 twice. Scales 7 — 40 — 5. Pectoral fin barely reaching line of anterior 

 dorsal ray. Caudal furcate half its length. 



In general proi^ortions this fish is a gocd deal like tbe European cari). 

 The occipital region is elevated and narrowly convex. The long dorsal 

 ray is almost as well developed as in the species of group first, extending 



