98 NEW FISHES FROM PACIFIC COAST GILBERT. 



torals. Cheeks covered with similar but smaller scales, the opercles 

 and rest of head naked. Lateral line running high, parallel with back, 

 on a series of enlarged scales, which are also partly embedded in the 

 thick skin. The lateral line fails to reach base of caudal by a distance 

 equaling one-half of head, and is present on eighty-two scales. 



Color: Dark olive-brown above, lighter below; a series of about 

 twelve quadrate dark blotches below lateral line, connected more or 

 less by dusky streaks with an alternating series along base of dorsal. 

 No bright colors. Dorsals, pectorals, ventrals and branchiostegal mem- 

 branes dusky straw-color. Anal black, the rays white-tipi)ed. Caudal 

 blackish. Peritoneum white. 



A single specimen from station 2944, in 30 fathoms. 



Gillellus gen. nov. {Leiitoscopichv). 



A separate dorsal fin on the na]>e composed of three s[)ines. Lateral 

 line descending posteriorly, its dorsal and median portions about 

 equal. Fringes of upper lip obsolete, those of lower lip little evident. 

 Head not cuboid, the mouth moderately oblique, the lowerjaw rounded 

 in front, and without symphyseal flap. 



The physiognomy is intermediate between Daciyloscopiis and Myxo- 

 dagmis, from both of which the genus is well sei)arated by the char- 

 acters of the dorsal fin and the lateral line. Named in honor of Dr. 

 Theodore Gill, to whom we owe our knowledge of the previously de- 

 scribed members of this most interesting group. 



Type, Gillellus scmicinctus sp. nov, 



60. Gillellus semicinctus sp. uov. 



Body deep, tapering rapidly either way from front of dorsal. Depth 

 5^ in length ; head 3§. Mouth moderately oblique, the maxillary extend- 

 ing beyond orbit, 3 in head. Tip of lowerjaw projecting. 



Teeth in a narrow band in front of jaws, becoming a single series 

 laterally; none of the teeth enlarged. Opercular fringes well devel- 

 oped, eight or nine in number. Fold of membrane between rami of 

 lowerjaw well developed. Pseudobranchi.T apparently not developed. 

 Gill rakers obsolete. 



Dorsal fin beginning at a distance from occiput less than diameter of 

 eye. The first three rays are entirely detached from the rest of the 

 fin, the first ray the highest, the second and third shortened. Of the re- 

 maining part of the fin, the first nine or ten rays are unarticulated and 

 spinous. First two anal rays not articulated. Caudal about If in 

 head. Pectorals 1^. 



D. III-IX or X,'28; A. II, 30 or 31. Lat. 1., 25 to 28-3-15 to 18 (43 

 to 49 scales in all). 



Lateral line running anteriorly along the very base of spinous dorsal, 

 no scales intervening between it and base of fin. It descends to 



