324 CALIFORNIA ACADEMY OF SCIENCES. 



light areas along the lateral line; fins speckled; the 

 largest specimen is faded. 



Head 4^-3^; depth 7-6; D. 10; A. 11; Br. 10-12. 



Seven specimens .12-. 26 ni. Curico; Santiago. Stein- 

 dachner. 



LIX. Pariolius. 



Pariolius Cope, Proc. Acad. Nat. Sci. Phila. 1871, 289 

 (armillatus). 



Type: Pariolius armillatus Cope. 



Dorsal fin placed in front of the ventrals. No nasal 

 barbel. Opercle and preopercle unarmed. A single 

 barbel on each maxillary and two pairs of mentals. 



This genus is closely related to Nematogenys and Tri- 

 chomycterus. 



256. Pariolius armillatus. 



Pariolius armillatus Cope, 1. c. (Ambyiacu); E. & E. Proc. Cal. 

 Acad. Sci. 2d Ser. ii, 50, 1889. 



Head flat, rounded; eyes small, superior. Interorbital 

 3| in length of head. Maxillary and postmental barbels 

 reaching beyond base of pectoral. Caudal acuminate. 

 Dark brown, nearly black on the top of the head; under 

 surfaces from anus brownish yellow, brown punctulate. 

 A broad yellow collar at base of pectorals; a dark spot on 

 base of caudal. D. 7; A. 11; Head 4h. (Cope.) 



LX. Pygidium. 



TricJtomy dents Valenciennes, Humboldt's Rec. d'Obs. 

 Zool. et Anat. ii, 348, 1833 (nigricans) not Thrichomycterus 

 Humboldt. 



Thrychomyderus CuY. & Val. Hist. Nat. Poiss. xviii,485, 

 1846 (misquoted). 



Thridiomyderiis Girard, U. S. Nav. Astron. Exped. ii, 

 242, 1855 (misquoted). 



Pygidiunt Meyen, Reise, i, 475, 1835 (fuscum). 



Type: Pygidium fuscum Meyen. 



