120 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



caudal. Caudal deeply forked, its lobes slender, tlie upper the longer. 

 Scale.-, 7-:57-."i; 1). -0 or 27. Chesapeake Bay to Mississippi Valley; 



;:nirrally abundant. 



(l(\it<>xti,i,iiix iipr'uni* L<- Sueur, Jonrn. Acini. Xat. Soi. Philn. 1817,91; Giiuther, vii, 



]-J: Ciitoxtoiitiix n I if ir Raliuesque, It-bill. Oh. 18'JO, 50: Carpiodes rcJifcr Cope, Proc. 



Aiin-r. 1'liil. Sue. I'hila. 1~TO, 4>~2 : Carpiudi'S rdij\r Jordan, 1. c. 190: Carpiodes cutisan- 



'<>[", run. Anirr. Pbil. Soc. Phila. 1S70, 481: Carpiodes culisanserinus Jordan, 



1. < . I'.i I: Ciirpiodi's -Wf/ie Cope, Proc. Ainer. Phil. Soc. Pbila. 1870, 41.) 



121. C. duffos-Dnns Cope. 



Mn/./.le exceedingly blunt, so that the anterior edge of the mandible is 

 in line with the anterior rini of the orbit, and the maxillary reaches to 

 ilif anterior edge of the pupil. Anterior suborbital deeper than long. 

 I I-ad -l\ in length. Eye quite large, 31-4 in head. Body arched, the 

 depth somewhat less than half the length. First ray of dorsal nearer 

 nm/zle than base of caudal. Scales G-35-4; D. 24; A. 8; V. 9. Ohio 

 Valley; not common. Perhaps a deformity of the preceding. 



(Cope, Proc. Arner. Pbil. Soc. Pbila. 1870, 480; Jordan, 1. c. 195.) 



62. CYCLEPTUS Rafmesqiie. 

 Blade Horse. 



(RafuK-squc, Jonrn. Pbys. Chim. Hist. Nat. Paris, 1819, 421 : type Cydcptus nigrcs- 

 Uat'. = Catotitomus p.longatus Le Sucur.) 



Head very small, short and slender, its length contained 0-7 times in 

 that of the body; its upper surface rounded. Eye small, behind the 

 middle of the head ; not very high up, its length G-8 in that of the head. 

 Sulxu hital bones small and narrow. Fontanelle entirely obliterated by 

 the union of the parietal bones. Mouth small, entirely inferior, over- 

 lapped by the projecting snout; the upper lip thick, pendent, covered 

 v. iih .".-.") rows of tubercles, the outer quite large, the inner small; lo\\er 

 lip moderate, formed somewhat as in CatoxtoniHN, but less full, incised 

 behind, .laws with rudimentary cartilaginous sheath. Muciferous svs- 

 tnn not greatly d' veloped. Opercular apparatus not greatly devel- 

 oped; the open-ilium smooth and narrow. Isjhmus moderate. Gill- 

 rakers moderately long, sol't. riiaryngeal bones strong; the teeth stout, 

 increasing in si/e downwards, rather wide apart. Body elongate, mod- 

 erately eompressed, not miieh elevated ; the caudal peduncle long; the 

 Btesl depth conlnined !-( times in length. Scales moderate, about 

 equal over the body, not closely imbricated, with Avide, exposed sur- 

 I'ace-. the number in the lateral line from 55-GO, and about 17 in a trans- 

 \erse series from dorsal to \entrals. Edges of scales eremite. Lateral 

 line veil d-\ eloped, nearly straight. Fins rather large, dorsal fin be- 



