170 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



>omctimes a small dark spot at base of caudal. Ilead 4; depth 5. D. 

 7 ; A. 7; scales 4-33-3; teeth -1-1, without grinding surface. L. 2$ 

 inches. I'pper Missouri region. 

 (Jordan. Mull, lluydeu's Geol. Surv. Terr, iv, 791, 1878.) 



" " 1 'ill two-rowed. 



t Teeth without grinding surface. 



217. C. cobitis (Grd.) J. & G. 



llody moderately elongate, subfusiforin, compressed. Head small, 

 subconieal, depressed. Mouth small, terminal, oblique, without barbels, 

 the maxillary falling far short of eye; lower jaw included. Eye mod- 

 erate, high up, midway in head; isthmus very wide. Yeutrals slightly 

 in advance of dorsal. Fins all high. Lateral line nearly straight. Body 

 olivaceous, with dusky specks above; a black spot at base of caudal. 

 Head 4; depth 4^. D. 8; A. 7; Lat. 1. C3. Teeth without grinding 

 surface, 1, 3-3, Ijjide Girard.* L. 2^- inches. Eio Gila. (Girard.) 



( Tiarofja colritis Girard, Proc. Acad. Nat. Sci. Philn. 185G, 204, aiid U. S. Mcx. Bound. 

 Surv. Ichth. (JO : Lciiciscus colitis Giinther, vii, ^47.) 



21. C. sinia (Cope) Jor. & Gill). 



Body robust. Head short and broad, with short, decurved mu/./.le. 

 Mouth large, oblique, the upper lip below the level of the pupil, the 

 maxillary extending past the front of orbit. Eye moderate, 4} in head. 

 Fins lar-e, the dorsal well behind ventrals. Coloration entirely silvery, 

 brightest on the sides. Head 4; depth 4}. D. 8; A. 9; scales 

 8-35-4, L'2 series in front of the dorsal iin ; teeth 1, 4-4, 1. L. .'4 

 inches. Kio Grande at San Ildefonso, New Mexico. (Cope.) 



(AUnn-nrlhix Kimiis Cope, Zool. Lieut. Win M-ler's Expl. W. lUOth Mt;r. v, (149, 1870.) 

 U Teeth with <;riiidiii^ .surfjicc more or less <lc\ dojicd. (IlndHonins Girard. t) 



2lf>. C. s:ilailaiia Jor. vV MIM.M. 



Jiody elongate, but less so than in (\ Ntorrridna, moderately com- 

 j.ressed. Caudal peduncle, long. Head large, rather heavy and gib- 

 lions forward, the mux/.le rounded in profile. Eye large, 3\ in head. 

 Month mnderatr. Miltinf'erior, the maxillary not reaching to the eye. 

 Scales lar-c. thin and loose, about fL'in front of the dorsal Iin. Lateral 

 line somewhat decurved in front. Fins rather small, pectorals not reach- 

 ing tn vent i a I -. t In- latter not to vent. Coloration pule olivaceous, nearly 



' If this number of teeth i^ normal and not merely line t.i aeeident, this species of 



((.lirse due, nut lielun^ to <'liol<l. 



'.n.inl, 1'ioe. .\.-:id. N..I. S, i. I'liila. K.C., 210: tyjic Clupca hudsonia Do Witt 

 Clinton. (The n;ime from HmlMUi K'iver.) 



