40 BULLETIlSr 95^ UNITED STATES NATIONAL MUSEUM. 



disappearing posteriorly ; side scaled to base of pectoral or lower, the 

 naked area of belly including the base of the anal ; front of pectoral 

 naked; top of head to front of eyes fully or partly scaled; area 

 around and in front of eye naked or with several scales; 21-24 

 scales on median line of back between head and origin of dorsal, 16 

 or 17 rows between origin of dorsal and origin of anal. 



Color in alcohol, back dusky brown; belly fleshy colored, tinged 

 with yellow; fins dusky. 



This is said to be a very good food fish. 



53. ORESTIAS ELEGANS Carman. 



Orestias elegans Gaeman, The Cypriuodonts, Mem. Mus. Comp. Zool., vol. 

 19, 1895, p. 149 ; Laguuas de la Cordillera de la Ascension ; small lakes 

 among headwaters of Rimac River. 



54. ORESTIAS MULLERI Valenciennes. 



Orestias miilleri A'axenciennes in Cuvier and Valenciennes. Hist. Nat. 

 Poiss., vol. 18, 1846. p. 179 (240).— Garman, The Cyprinodonts, Mem. 

 Mus. Comp. Zool., vol. 19, 1895, p. 149 ; Lake Titicaca. 



55. ORESTIAS TSCHUDII Castelnau. 



Orestias tschudii Castelnau, Exp. Amer. Sud., Poiss., 1855, p. 51, pi. 27, fig. 

 1. — Pellegrin, Bull. Soc. Zool. France, vol. 29, 1904, p. 92 ; Poiss. Lacs 

 Hauls Plateaux de I'Amer. du Sud, 1906, pp. 127, 129, fig. 19n". 



Contrary to the opinion of later writers, Pellegrin states that this 

 species differs from O. agassizii. 



56. ORESTIAS AGASSIZII Valenciennes. 

 CABACHITO. 



Orestias agassizii Valenciennes in Cuvier and Valenciennes, Hist. Nat. 

 Poiss., vol. 18, 1846, p. 178 (275) ; Corocoro.— Garman, The Cyprin- 

 odonts, Mem. Mus. Comp. Zool., vol. 19, 1895, p. 150. — Steindachner, 

 Herpet.-ichthyol. Ergebnisse einer Reise nach Siidamerika, Denkschr. 

 Akad. Wiss. Wien, vol. 72, 1902, p. 58, pi. 3, fig. 3.— Pellegrin, Bull. 

 Soc. Zool. France, vol. 29, 1904, pp. 93-94. — Starks, Fishes from 

 Ecuador and Peru, Proc. U. S. Nat. Mus., vol. 30, 1906, p. 780.— 

 Pellegrin, Poiss. Lacs Hauls Plateaux de I'Amerique du Sud, 1907, 

 pp. 19-23, pl. 14, fig. A-D. — Evermann and Radcliffe, Notes on a 

 Cyprinodont (Orestias agassizii) from Central Peru, Proc. Biol. Soc. 

 Washington, vol. 22, 1909, pp. 165-170. 



Orestias ortonii Cope, Journ. Phila. Acad. Nat. Sci., 1875, p. 186 (1874- 

 1881) ; Lake Titicaca. 



Orestias frontosus Cope, Journ. Phila. Acad. Nat. Sci., 1875, p. 187 (1874- 

 1881) ; Lake Titicaca. 



Two specimens, field No. 562, 6.7 and 7.0 in length, from Lake 

 Titicaca, taken at the dock at Puno. 



