120 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
caudal. Caudal deeply forked, its lobes slender, the upper the longer. 
Scales 7-37-5; D. 2G or 27. Chesapeake Bay to Mississippi Valley; 
generally abundant. 
(? Catosiomus crjpriniis Le Sueur, .Tourn. Acad. Nat. Sci. Phila. 1817, 91 ; Giiiither, vii, 
12: Caiostomus velifcr Rafinesque, Iclitli. Oli. 1820, 56: Carpiodes veJ if er Cope, Proc. 
Aiuer. Phil. Soc. Phila. 1870, 482 : Carpiodes velifer Jordan, 1. c. 196: Carpiodes cutisan- 
serinns Cope, Proc. Ainer. Phil. Soc. Phila. 1870, 481 : Carpiodes cutisanserinus Jordan, 
1. c. 196 : Carpiodes selene Cope, Proc. Anier. Phil. Soc. Phila. 1870, 41.) 
121. C. dflfToi’ESlss Cope. 
iMuzzle exceedingly blunt, so that the anterior edge of the mandible is 
in line with the anterior rim of the orbit, and the maxillary reaches to 
the anterior edge of the pupil. Anterior snborbital deeper than long. 
Head 44 in length. Eye quite large, 31-4 in head. Bodj" arched, the 
depth somewhat less than half the length. First ray of dorsal nearer 
muzzle than base of caudal. Scales 6-35-4 ; D. 24 ; A. 8 ; Y. 9. Ohio 
Valley; not common. Perhaps a deformity of the preceding. 
(Cope, Proc. Amer. Phil. Soc. Phila. 1870, 430; Jordan, 1. c. 195.) 
62. — CVCLEPTUS Rafinesque. 
Blade Horse. 
(Rafinesque, Journ. Phys. Chiin. Hist. Nat. Paris, 1819, 421 : type Cycleptus nigres- 
cens Raf. = Catostomiis elongatus Le Sueur.) 
Head very small, short and slender, its length contained C-7 times in 
that of the body ; its upper surface rouuded. Eye small, behind the 
middle of the head ; not very high up, its length G-8 in that of the head. 
Suborbital bones small and narrow. Fontanelle entirely obliterated by 
the union of the parietal bones. Mouth small, entirely inferior, over- 
lapped by the iirojecting snout; the upper lip thick, pendent, covered 
with 3-5 rows of tubercles, the outer quite large, the inner small ; lower 
lip moderate, formed somewhat as in Catostomiis, but less full, incised 
behind. Jaws with rudimentary cartilaginous sheath. Muciferous sys- 
tem not greatly developed. Opprcular apparatus not greatly devel- 
oped ; the operculum smooth and narrow. Isthmus moderate. Gill- 
rakers moderately long, soft. Pharyngeal bones strong ; the teeth stout, 
increasing in size downwards, rather wide apart. Body elongate, mod- 
erately comiiressed, not much elevated ; the caudal peduncle long ; the 
greatest depth contained 4-6 times in length. Scales moderate, about 
(Hjual over the body, not closely imbricated, with wide, exposed sur- 
faces, the number in the lateral line from 55-60, and about 17 in a trans- 
verse series from dorsal to ventrals. Edges of scales creuate. Lateral 
line well develojied, nearly straight. Fins rather large, dorsal lin be- 
