1. CATOSTOMUS. 15 



fin extending beyond the vertical from the origin of the dorsal (in 

 male specimens?) (Gir.) 



Rio San Pedro, tributary of the Rio Gila. 



4. Catostomus gnzmamensis. 



Catostomus (Acomus) guzmaniensis, Gii-ard, Proc. Ac. Nat. Sc. 

 Philad. 185t, p. 173, and in U. St. &■ Mex. Bowul. Surveij, Ich- 

 thyol p. 39, pi. 23. figs. 6-10. 



D. 14. A. 9. 



Scales very small. Tho height of the body is equal to the length of 

 the head, and contained four times and two-thirds in the total (with- 

 out caudal). Lips very thick, papillose, the lower bilobed. Eye small, 

 in the middle of the length of the head. The pectoral fin extends to, 

 or nearly to, the vertical from the origin of the dorsal. Back and 

 sides dark-coloured, with an.orange longitudinal band. {Qir^ 



Janos River, tributary of Lake Guzman, Chihuahua. 



5. Catostomus plebejas. 



Catostomus plebejus, Baird 4" Girard, Proc. Ac. Nat. Sc. Philad. 



1854, p. 28. 

 Minomus plebejus, Girard, in U. St. 8f Mex. Bound. Survey, Ich- 



thxjol. p. 38, pi. 22. figs. 1-4. 



D. 11. A. 8. L. lat. ca 80. 



The height of the body is nearly equal to the length of the head, 

 which is contained four times and two-thirds in the total (without 

 caudal). Lower lip moderately bilobed. Eye of moderate size, a 

 little behind the middle of the length of the head. Snout elongate. 

 There are twenty-eight or thirty longitudinal series of scales between 

 the dorsal and ventral fins. Origin of the dorsal fin nearly midway 

 between the end of the snout and the root of the caudal. [Girard.) 



Rio Mimbres, tributary of Lake Guzman. 



6. Catostomus teres. 



Cyprinus catostomus, Peck, Mem. Amer. Acad. ii. pt. 2. p. 55, pi. 2. 



fig. 4 (not Forster). 

 ? Cyprinus commersonuii, Lacep. v. pp. 606, 610. 

 Cyprinus teres, Mitch. Lit. Sf Phil. Trans. Netv York, i. p. 458 



?Lesueur, Journ. Ac. Nat. Sc. Philad. i. 1817, p. 108. 

 Catostomus communis, Besueur, Journ. Ac. Nat. Sc. Philad. i. 1817 



p. 95; Cuv. S)- Val. xvii. p. 426; Dekay, New Fork Fauna, Fish 



p. 196, pi. 33. fig. 106 ; Kirtlund, Bost. Journ. Nat. Hist. v. p. 265 



pi. 19. fig 1. 

 bostouiensis, Lesueur, I. e. p. 106 ; Cuv. <§- Val. xvii. p. 432 



Storer, Report Ichtln/ol. Massach. p. 84, and Mem. Amer. Acad, 



V. 1«55, p. 290, pi. 22. fig. 3. 

 Cyprinus (Catostomus) hudsonius, Richards. Faun. Bor.-Ainer. Pise. 



p. 112 (not synon.). 



( ) reticiilatus, Richards. I. c. p. 303. 



Catostomus pallidus, Dekay, I. c. p. 200, pi. 33. fig. 104. 



