182 CTPKINlDa. 



1. Hyborhynchns notatus. 



Af/assiz, I. c. ; Cope, Journ. Ac. Nat. Sc. Philad. xiii. p. 392. pi. 13. 

 %. 5. 



D. 1/8. A. 8. V. 8. L. lat. 45. L. transv. ^-^ 



The height of the body is from one-fifth to one-seventh of the 

 total length (without caudal), the length of the head two-ninths. 

 Snout blunt, with the upper ]irofile descending in a strong curve, as 

 long as the eye. Mouth small, inferior. The diameter of the eye 

 is rather more than one-fourth of the length of the head ; siiborbital 

 ring very narrow ; interorbital space flat, its width being more than 

 the diameter of the eye, and two-fifths of the length of the head. 

 The origin of the dorsal fin is a little behind that of the ventrals, 

 and midway between the end of the snout and the root of the caudal 

 fin ; upper margin of the dorsal fin rather convex ; ventral fin ex- 

 tending to the vent ; caudal fin forked. There are two and a half 

 longitudinal series of scales between the lateral line and the ventral 

 fin ; a faint blackish longitudinal stripe along the lateral line. 



Canada; United States. 



a. Three and a half inches long; snout tubercular. Montreal. 

 Purchased of Mr. Wright. 



h. Several specimens. Kenhawa River. Purchased of Mr, Cope. 



c. Adult ; snout tubercular ; tail deformed. Xenhawa River. Pur- 

 chased of Mr. Cope as Hyhorhynchus svperciliosus. 



87. CAMPOSTOMA *. 



Campostoma, Ai/uss. A> ler. Journ. 8c. i^- Arts, 1855, xix. p. 213; Cope, 

 Journ. Ac. Nat. Sc. Philad. xiii. pp. 356, 393 



Scales of moderate or smaU size; lateral line running along the 

 middle of the tail. Dorsal fin short, without spinous ray, com- 

 mencing nearly opposite the ventrals ; anal fin short. Mouth infe- 

 rior, narrow ; intermaxillaries slightly protractile. Lower jaw with 

 a sharp edge ; barbels none : gill-rakers extremely short and fine ; 

 pseudobranchijB. The attachment of the gill - membrane to the 

 isthmus takes place behind the pra^operculum. Air-bladder enve- 

 loped by the numerous convolutions of the intestinal canal, which is 

 ong (Mcsoci/sti, Cope). Pharyngeal teeth 4 — 4, compressed. 

 United States. 



* 1. Campostoma formosiiUim, Girard, Free. Ac. Naf. Sc. Plilad. ISfiO, 

 p. 176; or U. 8. &f Mex. Bound. lchth)/ol. p. 41, pi. 25. figs. 5-8.— Rio 

 Sabinal, Texas. 



2. nasatum. Girard, II. cc. figs. 9-12. — New Leon, Mexico. 



3. Hybognathus placitus, Girard, Proc. Ac. 2\af. Sc. Philud. 1856, p. 182; 



or U. S. cf Pac. E. U. E.rped. Fish. p. 236. — Campostoma plaf-itum, 

 Copr, Proc. Ac. Nat. Sc. I'hilad. 1864, ]i. 284 (name only). — Ai«kan.«a8. 



4. Campos! oma mormynis. Cape. I.e. — Bnu'". ]\!ai'omb County. 



.5. gobioninum, C'>pc, i.e. — Bruce. ?>lacoiiih Coimty and Grosse Isle. 



6 hippops, Cope, I. t'.--Platlc Eiver 



