no. 2075. FISHES FROM SOUTHERN CALIFORNIA— GILBERT. 373 



line enlarged and pointed backwards; a few teeth along inner edge of 

 middle of mandibular band somewhat enlarged; outer series on both 

 jaws slightly enlarged, horizontally set, curved. A single vomerine 

 tooth, smaller than those in jaws. Palatine teeth few in number, 

 small but firm. Mouth not very oblique, the maxillary reaching 

 vertical from middle of eye. Gill-rakers broad, short, 10 or 11 on 

 horizontal limb of outer arch. Gill-slit extending above level of 

 pectoral base for a distance equaling half diameter of eye. One or 

 two well-developed pseudobranchial filaments present. 



Skin thin, adherent, mucous pores very inconspicuous. 



Color light, with scattered dark specks, not forming dark streaks 

 along base of dorsal and anal as in L. extensus. The vertical fins 

 become dusky towards tail. Mouth and gill cavity light or slightly 

 dusky; peritoneum black, showing through the abdominal wall. 



In its slender form this species resembles L. extensus and L. parvi- 

 ceps, but is apparently not closely related to either. From L. par- 

 viceps it differs in the wider gill-slit, which extends as in all other 

 species save parviceps, above the base of the pectoral fin. From L. 

 extensus it differs strikingly in the dentition, there being a single 

 vomerine tooth and several short but rather strong teeth on each 

 palatine, while L. extensus has numerous small vomerine teeth in a 

 single series and no teeth on the palatine bones. Also, the upper 

 outline of head is different, being straight with slightly prominent 

 premaxillary processes in L. attenuatus and longitudinally concave 

 with prominent occiput in L. extensus. 



Direct comparison has been made with the type of L. extensus, but 

 unfortunately that diminutive specimen is in a poor state of preser- 

 vation, the vomerine teeth being lost. 



L. attenuatus is closely related to L. mandibularis , grossidens, and 

 lycodon, species with coarse teeth in wide bands, conspicuously ex- 

 posed when the mouth is closed. They have also short, broad gill- 

 rakers, which are broader at base than they are high. L. attenuatus 

 differs from the others in its very elongate form and in the numerous 

 rays in the vertical fins. 



Only the type known. 



The following species is here included, although from a more 

 northern part of the coast: 



LYCODAPUS GROSSIDENS, new species. 



Type-specimen. — Cat. No. 75824, U.S.N.M., 105 mm. long, from 

 station 3483, Bering Sea (57° 18' N.; 171° 18' W.), depth 56 fathoms. 



Total length to base of caudal, 102 mm., the following measure- 

 ments in hundredths of this length: Length of head, 17.5; width of 

 head, 7; bony interorbital width, 2; diameter of eye, 4; length of 

 snout, 4.7; length of maxillary, 8; distance from tip of mandible to 

 posterior margin of gill-membrane, 9; from posterior margin of gill- 

 membrane to upper end of gill-slit, 10; greatest depth at nape, 9; 



