166 DEEP SEA FISHES. 



thin flexible. Opercular spine weak ; no other spines on the head. No 

 barbels. Occipital and internarial crests of the skull moderately prominent. 

 Genital papilla small. Vertical fins united ; dorsal origin on the nape, for- 

 ward of the upper angle of the gill opening. Anal origin distant from the 

 head less than the length of the latter, below the twenty-fifth ray of the dor- 

 sal. Ventrals of a single filamentary ray, two thirds as long as the head, 

 close together, at the humeral symphysis, below the hind ends of the gills. 

 Pectorals wide at the base, flexible in the upper half, which is two thirds as 

 long as the head, rigid in the lower section, which is twice as long as the 

 upper portion and in which the rays are firmly joined in the basal half but 

 flexible, spreading, and connected by membrane in the distal moiety. 

 Upper section of pectoral with fifteen, and lower with fourteen or fifteen 

 rays. Caudal narrow, elongate, less than half as long as the head, acum- 

 inate. Scales small, thin, deciduous. Distance from bases of ventrals to 

 vent nearly one and one fourth times the length of the head. 



Blackish or brown ; muscular portions somewhat lighter, rusty ; linings 

 of mouth and body cavity black. Top and sides of head whitish ; probably 

 the mucous sacs, which cover these areas, are light producers. 

 Seventeen inches in total length. 



Eretmichthys ocella sp. n. 



Plate XXXVII. fy. 1 ; Plate LXXIX.fig. 1, Lat. Syst. 



Br. r. 8 (8-7); D. 121-12.3; A. 97-100; V. 1 ; P. 28 ; C. 8. 



Shaped much like E. jv'nnatus, but differing in nundjers of fin rays and in 

 form of pectoral fins. Body and head compressed, depth about one seventh 

 of the total length. Head less than half as wide as long, one fifth of the 

 total length, high at the nape, prominent on the internarial region, convex 

 across the forehead, with strong occipital crest on the skull. Snout large, 

 broad, thick, bluntly rounded at the end, high at the nostrils and above the 

 middle, more than twice as long as the eye. Mouth wide, somewhat oblique ; 

 maxillary nearly half as long as the head, dilated posteriorly to one and one 

 half times the width of the eye, lower angle acute, midlength nearly 

 below the middle of the oibit. Teeth small in viliiform bands on jaws, 



