190 CYPKINID^. 



the root of the caudal, and conspicuously behind the origin of the ven- 

 trals. Sides of the body irregularly marbled with brown and black. 

 Canada. 



a-b. Fine specimens (3-4 inches long). Montreal. Presented by 

 Th. Moore, Esq. 



This fish appears to have a somewhat smaller eye than Rh. na- 

 sxitus, of which it is, perhaps, merely a variety. 



3. Rhinichthys maxillosus. 

 Cope, Proc. Acad. Nat. Sc. PMad. 1864, p. 278. 



D. 10. A. 8. L. lat. 78. L. transv. 15/20. 

 Baruel nearly half as long as the eye, which is small, one-half of 

 the extent of the snout, and situated in the anterior half of the length 

 of the head. The height of the body is contained five times and one- 

 third, the length of the head four times in the total length (without 

 caudal). Snout distinctly projecting beyond the mouth. The ori- 

 gin of the dorsal fin is much nearer to the root of the caudal than 

 to the end of the snout, and behind the ventral. S^des with a dark 

 longitudinal shade ; a dark spot at the base of the caudal fin. 

 Kansas. 



a-h. Two of the typical specimens. Purchased of Mr. Salvin. 



4. Rhinichthys obtusus. 



Rhinichthys obtusus, Agassiz, Amer. Jmirn. Sc. SfAHs, 1854, xvii. p. 357. 

 luuatus, Cop», Proc. Ac. Nat. Sc. Philad. 1864, p. 278. 



D. 10. A. 8. L. lat. 63-69. L. transv. 13/18. 



Barbel minute. Snout but slightly projecting beyond the mouth. 

 The height of the body is contained four times and thrce-fuaiihs in 

 the total length (without caudal), the length of the head fo.v times 

 or four times and one-fourth. The eye is two-thirds of the extent 

 of the snout, and nearer to the end of the snout than to that of the 

 opercle. The origin of the dorsal fin is conspicuously behind that of 

 the ventrals, and much nearer to the root of the caudal than to the 

 end of the snout. A dark band, with lighter edges, runs from the 

 snout to the caudal. Back mottled with brown. 



Tennessee River, Holstun River, Michigan. 



n. Adult. Tennessee River. Presented by Th. Moore, Esq 

 h-e. Adult. Holston River. From Mr. Cope's Collection {Argyreus 

 lunatvs). 



5. Rhinichthys meleagris. 

 Agassk, in Amer. Journ. Sc. S,- Arts, 1854, xvii. p. 357. 



This fish is characterized thus : — 



It is remarkably short and stout in conjparison to its congeneric 

 types, also smaller. The whole body is dotted with black upon a 

 silvery ground, the dots partly confluent ; tlie belly only is plain 

 silvery white. 



Burlington, Iowa. 



