26 BULLETIN &5, UNITED STATES NATIONAL MUSEUM. 



of jaws measured from tip of snout 2.5; space between eyes 1.5 

 times diameter of eye; body from tip of snout to center of vent 1.3 

 in tail; trunk 2.02 in tail; pectoral nearly as long as gape of jaws, 

 2.54 in head ; tip of snout to insertion of dorsal 2.22 in body. 



Teeth in lower jaw in two distinct series, sharp, pointed, fixed, 

 inside of these an inner series of irregular small teeth not dis- 

 cernible without dissection except for one or two more strongly 

 developed teeth; teeth in the upper jaw in two series; premaxillary 

 and vomerine teeth in a single series, those on premaxillaries longest 

 and sharply pointed. 



Color in alcohol, dark brown above, below yellowish olive, the line 

 of separation of the two colors quite distinct ; a row of about 20 small 

 round white spots, about one- fourth diameter of eye, arranged along 

 lateral line, disappearing posteriorly; a number of similar spots on 

 nape. Description of specimen 68 cm. in length from Paita. 



In a small individual from Callao the- head is 2.7 in body; body 

 (including head) 1.46 in tail; trunk 2.33 in tail; eye 1.42 in snout, 

 8.96 in head; snout 6.32 in head; gape of jaws 3; pectoral 2.4; dis- 

 tance from tip of snout to insertion of dorsal 1.T6 in body. Teeth 

 in jaws biserial, those on premaxillary and vomer uniserial. Color 

 in alcohol essentially as in the larger example; on the top of the 

 head back of the eyes there is a trace of a narrow white line ex- 

 tending across top of head, zigzagging downward to level of gape 

 of jaw. 



These specimens agi'ee as closely with Cope's description of 0. 

 uniserialis as with Giinther's description of 0. 'pacijici, and the two 

 species appear to be one. In Giinther's description of pacifici^ he 

 states the teeth on maxillary and mandible are triserial or quadri- 

 serial. In our larger example there are two rows of well-developed 

 teeth in each jaw, with several straggling teeth of a third row in 

 the lower jaw; appearing above the mucus and integument, dissec- 

 tion reveals an inner bony ridge from which the third row is de- 

 veloped, with small teeth on it; in the upper jaw there is a trace 

 of a similar ridge. 



Genus GYMNOTHORAX Bloch and Schneider. 



30. GYMNOTHORAX WIENERI Sauvage. 

 MORENA; MORENA COLORADO. 



Plate 3, fig. 3. 



Ch/mnothorax ivieneri Saltvage, Bull. Soc. Philom. Paris, 1883, p. 161. 



July 7 ; Chile or Peru. 

 Lycodontis v:ieneri Abbott, Marine Fishes of Peru, Proc. Acad. Nat. Sci. 



Phila., 1899, p. 332. 



Two specimens, field Xos. 09677 and 09471, respectively 40 and 81 

 cm. long, from Lobos de Afuera, and one, field No. 449, 64 cm. long, 

 from Callao. 



