336 CALIFORNIA ACADEMY OF SCIENCES. 



Pectorals obliquely rounded, the first ray produced in 

 a filament. Origin of dorsal equidistant from tip of cau- 

 dal and anterior margin of the eye, the whole fin in front 

 of the anal and behind the ventral fins. Caudal emar- 

 pfinate. Distance of anal from base of caudal 6 m the 

 length. Origin of ventrals midway between tip of snout 

 and tip of caudal. 



Reddish brown; sides, back, dorsal and caudal fins 

 with large dark spots, those on the head smallest; lower 

 surface plain. 



Head 5| (6 in total); D.:i2; A. 9. 



One specimen .195 m. Callao?, Peru. Steindachner. 



267a. Pygidium dispar punctulatum. 



Trichomt/cterus punctalatus Cuv. & Val. Hist. Nat. Poiss. xviii, 48S, 

 1846 (Lima); Liitken, Velhas Flodeus Fiske, 137, 1875 (Callao). 



Trichomycterus puiictatus Cuv. & Val. 1. c. pi. 552. 



Pygidium dispar punctulatum Eigenm. & Eigenm. Proc. Cal. Acad. 

 2d Ser. ii, 52, 1889 (Eio Remac, uear Lima). 



Habitat: Western slopes of Peruvian Audes. 



This variety can be distinguished by the small spots 

 covering the sides and back. 



Origin of dorsal equidistant from tip of caudal and 

 somewhere between occiput and anterior margin of eye; 

 distance of anal from base of caudal 6-6f in the length. 



Head 5i-5i (6i-6| in the total); D. 12; A. 10. 



Twenty-nine specimens .11-. 18 m. Rio Remac near 

 Lima. Steinda.chner, 



268. Pygidium nigromaculatum. 



Trichomycterus nigromarulatun Boulenger, Ann. & Mag. Nat. Hist. 



Ser. 5, vol. 19, 349, 1887 (Colombia). 

 Pygidium nigromaculatum Eigenm. & Eigenm. Proc. Cal. Acad. 2d 



Ser. ii, 52, 1889. 

 Habitat: Colombia. 



This species is very nearly related if not identical with 

 P. dispar. 



