348 CALIFORNIA ACADEMY OF SCIENCES. 



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

 terior vertebrae. 



It is doubtful whether the genus Astroblepus belongs 

 here or not. 



ANALYSIS OF THE GENERA OF ARGIIDJE. 



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

 dorsal profile anteriorly and posteriorly; lower lip very broad. 



ARGES LXIII. 

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



CYCLOPIUM LXIX. 

 aaa. Adipose and ventral fins wanting. ASTROBLEPUS LXX. 



LXVIIL ARGES. 



Arges Cuv. & Val. Hist. Nat. Poiss. xv, 333, pi. 444, 

 1840 (sabalo). 



Brontes Cuv. & Val. 1. c. 341, pi. 445 (prenadilla). 



Type: Arges sabalo Cuvier & Vdlenciennes. 



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. 



Arges sabalo Cuv. & Val. Hist. Nat. Poiss. xv, 335, pi. 444, 1840 

 (Santa Anna); Castelnau, Anini. 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 (Kio 

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

 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. 



Bronf'x j,r<,iadilla Cuv. & Val. xv, 343, pi. 445, 1840 (Cotopaxi); 

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



^4n/r.s/>/v</m^7/Steiiidachner, Flussfische Siklam. iv, 20, pi. vi, fig. 

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



Arcjes brachy<'t/,/,(tln>t (iiinther, Proc. Zool. Soc. Lond. 1859, 92 (An- 

 des <>f Western Peru); id. Cat. Fish. Brit. Mus. v, 222, 1864 

 (copied). 



Habitat: Andes of Peru. 



