44. ROHTEICHTHTS. 191 



6. Rhinichthys atronasus. 



Cyprinus atronasus, Mitch. Lit. ^ Phil. Trans. New York, i. p. 4G0. 

 Argyreus atronasus, (Heckel) Storer, Mem. Jmer. Acad. v. 1855, 



p. 288, pi. 21. fig. 4. 

 Leuciscus atronasus, Storer, Report Fish, of Mftssachm. p. 92 ; Cuv. 



8f Val. xvii. p. 376, pi. 511 : Dekay, New York Fauna, Fish. p. 205, 



pl.23. fig. 69. 

 Rhinichthys atronasus, Agass. Lake Super, p. 354 (name only). 



D. 10. A. 8. L. lat. 65. L. transv. 13/16. 



Barbels none. Jaws nearly even in front. The height of the 

 body is contained four times and two-thirds in the total length 

 (without caudal), the length of the head thrice and three-fourths. 

 The diameter of the eye is nearly two-thirds of the extent of the 

 snout. The origin of the dorsal fin is nearer to the root of the caudal 

 than to the end of the snout, and somewhat behind that of the ven- 

 trals. A black band rims from the snout to the root of the caudal. 



United States. 



a. Adult. North America. Purchased of Hr. Brandt. 



h-c. Adult. Parmachenee Lake. Purchased of Mr. Wright. 



Third Group. ROHTEICHTHYINA. 



Anal fin very short, with not more than six branched rays. 

 Dorsal fin behind ventrals. Abdomen compressed. Lateral line 

 running along the median line of the tail. Mouth without 

 barbels. Pharyngeal teeth in a triple series. 



44. ROHTEICHTHYS. 



Rohteichthys, Bleek. Prodr. Cypr. p. 395. 



Scales rather small. Belly compressed into a sharp ridge behind 

 the ventrals, the scales of one side not overlapping on the other. 

 Dorsal fin short, with a strong serrated ray, behind the ventral ; anal 

 fin short. Cleft of the mouth lateral ; barbels none. Pharyngeal 

 teeth compressed, terminating in a hook, 5.3. 2 — 2 .3.5. 



East-Indian archipelago. 



1. Rohteichthys microlepis. 



Barbus microlepis, Blcek. Nat. Tydschr. Ned. Ind. i. p. 12. 

 Systomus microlepis, Bleek. I. c. ii. p. 60. 



Rohteichthys microlepis, Bleek. Prodr, Cypr. p. 390 ; or Atl. Lchtli. 

 Cypr. p. 115, tab. 40. fig. 3. 



D. 12. A. 8. L. lat. 70-72. L. transv. 14/15. 

 The osseous dorsal ray is strong, coarsely serrated. Upper pro- 

 file of the head very concave. Mouth rather wide, the maxillary 

 extending nearly to the vertical from the front margin of the orbit ; 

 the lower jaw jn-ojecting slightly beyond the upper, with a con- 



