30. CATOSTOMID.3E CARPIODES. 119 



the preceding by the much smaller eye. This description is based on 

 specimens from Wabash Biver. 



(Carplodcs cyprinus* Jordan, 1. c. 198: Carpiodes tumidus Baird & Girard, Proc. Acad. 

 Nat. Sci. Phila. 1854, 28 : Carpiodes damalis Girard, Proc. Acad. Nat. Sci. Phila. 1856, 

 170: Carpiodcs grayi Cope, Proc. Amer. Phil. Soc. Phila. 1870,482.) 



11. C. tBlOEnpSOcai Agassiz. Lake Carp. 



Body stout, short, the back much arched, the depth 2J in length. 

 Head 4 to 4J in length, the muzzle moderately pointed. Dorsal rays 

 considerably elevated, two-thirds as long as base of fin. Eye small, 5 

 in head. Tip of lower jaw much in advance of nostrils, maxillary 

 reaching line of orbit. Anterior suborbital large, deep, roundish. Ori- 

 gin of dorsal about midway of body. Scales rather closely imbricated, 

 8-39 to 41-6 ; D. 27 j A. 7 j Y. 10. Great Lake region ; abundant. Per- 

 haps identical with the preceding. 



(Agassiz, Amer. Journ. Sci. Arts, 1855, 191 ; Jordan, 1. c. 198.) 

 aaa. Head long, about 3$ in length. 



119. C. toasoai Agassiz. 



Head long, contained about 31 times in length to base of caudal. 

 Muzzle elongate-conic, so that the eye is nearly median, the middle of 

 the length of the head falling in front of its posterior margin. Body not 

 much arched, depth 3 in length. Anterior rays of dorsal pretty high, 

 not much shorter than the base of the fin, not thickened at base. Lips 

 well developed. Eye large, 4^ in head. Scales 7-40-5 ; D. 27 j A. 7 ; 

 V. 10. Mississippi Valley. 



(Agassiz, Atncr. Journ. Sci. Arts, 1854, 356 ; Cope, Proc. Amer. Phil. Soc. Phila. 

 1870, 483; Jordan, 1. c. 197.) 



** Dorsal fin with the anterior rays very much elevated and attenuated, about equal- 

 ling, or more usually exceeding, the length of the base of the fin. 



120. C. cy priMTOS t (Le Sueur) Agassiz. Quillbaclc; Spear-fish; Sail-fish; STdmlack. 



Muzzle conic, projecting, obtusely pointed, tip of the mandible reach- 

 ing to opposite nostrils ; maxillary reaching to opposite front of orbit. 

 Anterior suborbital as deep as long. Head 3^-4 in length. Eye large, 

 3|-4i in length of head. Body much arched above, the depth 2^-2i 

 in length. First ray of dorsal usually nearer muzzle than base of 



* The original Catostomus cyprinus was described from tributaries of Chesapeake 

 Bay. It cannot be the present species, as the dorsal is described and figured as 

 strongly falcate and the caudal deeply forked. We have seen no specimens from the 

 original locality. 



t Possibly two or three species are here included: velifer, with the anterior dorsal 

 rays longer than the fin ; cyprinus, with them somewhat shorter ; and cutisanserinus, 

 with a blunter snout and the dorsal rays very long. 



