150 BULLETIN 95, UNITED STATES NATIONAL MUSEUM. 



filamentous, bifid, inserted at throat, under anterior half of eye; 

 distance from tip of snout to vent 2.2 to 2.25 in total length. 



Color in alcohol, back, sides, and fins slaty ; ventral surface of 

 head and belly anteriorl}^ sulphur-yellow, becoming dusky pos- 

 teriorly; sides with small irregular sulphur-yellow spots, very ir- 

 regular in arrangement : pectorals with traces of spots, margined 

 with sulphur-3^ellow. 



Color in life, ventrai aspect of head and abdomen light, unevenly 

 washed with salmon ; upper and lower lips deep salmon ; the salmon- 

 color of ventral surface extending backward along the base of anal 

 fin; body dark chocolate brown, darkest above, with a few light 

 spots, irregular in form and disposition: these spots smaller, more 

 irregular in form and distribution and more sharply contrasted with 

 the darker ground color, than those of the common congrio {G. 

 cMlensis). In the latter, the light markings, while somewhat irregu- 

 lar in form and arrangement, are yet very characteristic in ap- 

 pearance, being evenly distributed and tending to certain forms — 

 circles, hour-glasses, etc. The circles may be complete or incomplete, 

 entirely of a light color or Avith brown centers. Some of the con- 

 grios, at least, show a bronze tint on the sides. 



181. GENYPTERUS CHILENSIS (Guichenot). 

 CONGRIO; OKACHA. 



Conger chilcnsis Guichenot in Gay, Hist. Chile, Zoo!., vol. 2, 1S48, p. 339. 

 Genyptcrus nigricans Philippi, Ann. Univ. Chile, vol. 19, 1857, p. 185 ; 



Wiegm. Arch. Naturg., 1857, p. 629. 

 Genyptcrus cliHensis Gunther, Cat. Fish. Brit. Mus., vol. 4, 1862, p. 380. — 



Abbott, Proc. Acad. Nat. Sci. Phila., 1899, p. 475. — Deltin, Cat. Peces 



de Chile. 1901, p. 99 ; Los Congrios de Chile, p. 189, pi. 13, fig. 1 ; Rev. 



Chilena Hist. Nat., No. 3, ASo VII, June. 1903. 



One specimen, field No. 09T22, 65.5 cm. long, from Guanape North 

 Island; one, field No. 09717, 48 cm. long, from Pisco; and three, 

 field Nos. 09703, 08713, and 522, respectively 39.5, 30.5, and 36.5 cm. 

 long, from Mollendo. 



Head 3.G8 to 4 in total length ; depth 5.45 to 7.44 ; snout 4.14 to 4.95 

 in head ; postorbital part of head 1.42 to 1.5 ; eye 7.46 to 9.36 ; breadth 

 of head 1.76 to 2.67 ; interorbital 5.23 to 5.5 ; maxillary 2.33 to 2.6 ; 

 length of pectoral 1.88 to 2.09; breadth of base of pectoral 5.05 to 

 6.25; distance from tip of snout to origin of dorsal 3.3 to 3.65; 

 distance from tip of snout to anal 2.11 to 2.29 : ventrals much shorter 

 than head, not split to base. In form this species agrees with G. 

 hlacodes. 



Color in life, general color light chocolate-brown, with very con- 

 spicuous hieroglyphic-like white markings over entire body; while 

 these are somewhat irregular in form and arrangement, they are 

 still very characteristic in appearance, are evenly distributed, and 



