244 DEEP SEA FISHES. 



LvcnNOPOLES gen. n. 



Elongate and slender in form, with body and head much compressed, and 

 with the body cavity occupying half or more of the entire length. Body 

 covered by large thin scales; head naked. Mouth wide, oblique; inter- 

 maxillary forming half or more of the dentigerous portion of the upper 

 jaws. Teeth small, unequal, acicular, in a single series on each jaw, a row 

 of six or eight on each palatine, in a viUiform patch of very small ones on 

 the vomer at each side of which there is a small conical tooth. Eyes large, 

 lateral. Gill openings very wide, extending forward to below the nostrils ; 

 gill rakers numerous, of moderate length, slender. No pseudobranchise. 

 Branchiostegal rays fourteen. No barbel. No air bladder. Stomach long, 

 ca3cal. Dorsal short, origin near the middle of the total length, slightly 

 forward of that of the anal. Anal long. Caudal forked. Ventrals abdominal. 

 A spine-like prominence below the scapulary symphysis. A large luminous 

 disk between each eye and the intermaxillary, two smaller ones behind 

 the end of the maxillary — one behind the other, one below each side of the 

 chin, a series of eleven on each branchiostegal membrane — between the 

 basal portions of the rays, a series of nine at each side of the isthmus, and 

 four series of about forty-four glands each on each side of the lower portion 

 of the body. 



Distinguished from Gonostoma to which this genus is closely allied by a 

 larger intermaxillary, by the small teeth, by a greater number of series of 

 luminous glands, and by the positions of dorsal and ventrals. 



Lychnopoles argenteolus sp. n. 



Plate LIU. jig. 4,4 a. 



Br. r. 14; D. 14-16; A. 26-29; V. 7 ; P. 9; LI. 45 ca. ; Ltr. 8; Vert. 

 20 + 25. 



Moderately elongate, slender, much compressed, depth one seventh and 

 length of body cavity one half of the total length. Head narrow, nearly 

 one fifth of the entire length, forehead flattened, cheeks vertical, chin 

 prominent and pointed. Snout medium, one and one half times as long as 

 the eye, sharp at the symphysis of tlie lower jaws. Eye rather large, one 

 fifth as long as the head, two thirds of the length of the snout, four fifths 



