348 CALIFORNIA ACADEMY OF SCIENCES. 



Air-bladder enclosed in the lateral processes of the an- 

 terior vertebrae. 



It is doubtful whether the genus AHtrohlepiis belongs 

 here or not. 



ANALYSIS OF THE GENERA OF ARGIID^. 



a. Adipose fiu a long low fold of skin which gradually merges iuto the 

 dorsal profile anteriorly and posteriorly; lower lii^ very broad. 



Arges lxiii. 

 aa. Adipose fin short, with a spine placed near the candal fin. 



Cyclopium lxix. 

 aaa. Adipose and ventral fins wanting. Astroblepus lxx. 



LXVIII. Arges. 



Arges Cuv. & A'al. Hist. Nat. Poiss. xv, 333, pi. 444, 

 1840 (mlxdo). 



Brontes Cuv. & Val. I.e. 341, pi. 445 (prenadiUa) . 



Type: Arges sabalo Cuvier & Valenciennes. 



Habitat: Peruvian Andes and Cordilleras. 



We have not been able to examine any species of this 

 genus. They have all been well figured and described 

 by Steindachner. 



288. Arges sabalo. 



Aryes sabalo Cuv. & Val. Hist. Nat. Poiss. xv, .3.35, pi. 444, 1840 

 (Santa Anna); Castelnau, Anim. Am. Sud. 40, 1855 (Rivers of 

 Central Brazil); Giinther, Cat. Fish. Brit. Mus. v, 222, 1864 

 (copied); Steindachner, Ichthyol. Beitr. iv. 48 (Tullumayo, 

 Amable Maria); Cope, Proc. Am. Philos. Soc. xvii, 681, 1878 (Eio 

 Urubamba, 10,000 feet alt.); Steindachner, Flussfische Siidam. 

 i, 23. 1879 (Tullumayo; Amable Maria; Tambillo); id. 1. c. iv, 

 17, pi. iv, fig. 2, 1882 (Rio Huambo). 



Habitat: Peruvian Andes and Cordilleras. 



289. Arges prenadilla- 



Brontes j^renadilla Cuv. & Val. xv, 343, pi. 445, 1840 (Cotopaxi); 

 Giinther, Cat. Fish. Brit. Mus. v, 224, 1864 (copied). 



Arges prenadilla Bteindachnei; Flussfische Siidam. iv, 20, pi. vi, fig. 

 5, 1882, notes on the types. (Peru.) 



Arges brachycephalus Giinther, Proc. Zool. Soc. Lond. 1859, 92 (An- 

 des of Western Peru); id. Cat. Fish. Brit. Mus. v, 222, 1864 

 (copied). 



Habitat: Andes of Peru. ' 



