no. 2075. FISHES FROM SOUTHERN CALIFORNIA— GILBERT. 317 



Gill-rakers slender, 4 + 9, with one rudiment above, three below. 



Eye small, shorter than snout; maxillary long, but not reaching 

 the anterior margin of the very oblique preopercle; maxillary little 

 widened at tip, scarcely wider than the dentigerous premaxillaries; 

 vomerine teeth in two widely separated patches; palatine bands 

 broad, elliptical, nearly half length of premaxillaries. 



Body elongate, with deep caudal peduncle. Ventrals inserted in 

 advance of origin of dorsal, the latter nearer tip of snout than cau- 

 dal; pectoral well developed, but slender and pointed, none of the 

 rays filamentous, the third, fourth, and fifth the longest, reaching 

 to or nearly to base of ventrals. Ventrals reaching origin of anal. 

 First anal ray under the ninth or tenth of the dorsal. Adipose fin 

 unusually large, over last anal rays. 



Scales caducous, those in lateral line enlarged, much deeper than 

 the others. 



General color blackish, including the rays and membranes of all 

 the fins ; ventrals with a distinct whitish blotch on inner rays. 



Photophores. — No distinct antorbitals can be detected in any of 

 our specimens, but smaller individuals would probably exhibit them. 

 In none of our specimens is the integument of the head perfectly 

 preserved; enough remains, however, to show that the cheeks, sub- 

 orbital region, snout, and vertex are covered with extremely numer- 

 ous minute luminous organs, which seem to be present also on the 

 opercles and are perhaps generally distributed on other parts of the 

 head. On the anterior part of the cheeks, they are present in defi- 

 nite oblique somewhat wavy lines. A somewhat larger luminous 

 body is present on lower posterior portion of cheeks. The usual 

 photophores below the preopercle are present, but like those on the 

 branchiostegal membranes are poorly developed and obscured by 

 the black pigmentation of the parts. Photophores on body very 

 small, scarcely more than half the size of those in L. ritteri, resembling 

 those in L. niger and L. macropterus. 



Suprapectoral immediately below lateral line ; upper inf rapectoral 

 immediately in front of upper pectoral ray and slightly below it, the 

 lower infrapectoral below and behind the upper, the three pectoral 

 spots nearly in line. Thoracics 5, the fourth elevated, on level of 

 upper pectoral rays, a little behind vertical from third pair of thor- 

 acics; spots of first three pairs about equally distant from median 

 line, those of fifth pair very widely separated, in front of outer 

 ventral rays; second interspace shortest, the first longest. Supra- 

 ventrals vertically above ventral fin, on second scale below lateral 

 line, high above the level of the anterior supraanals, its distance 

 from lateral line half or slightly more than half its distance from 

 ventral fins. Ventrals 4, first pair behind inner ventral rays and 

 nearest the median line, the second pair most divergent, the second 



