162 DEEP SEA FISHES. 
length of the head. Crown very convex transversely and slightly so 
longitudinally. Snout short, less than two thirds as long as the eye, blunt, 
rather prominent above the midlength, Eye large, lateral, nearly twice 
as long as the snout, length equal to two thirds of the interorbital width. 
Nostrils at the side of the snout, rather close together, a short groove 
forward of the anterior at the lip. Mouth wide; maxillary extending 
backward of the eye about one third of the ocular diameter; lower jaw 
little longer. Teeth equal, in villiform bands on jaws, vomer and_pala- 
tines. Vomerine band resembling a V, open backward and curved in 
arms and apex so that the latter is convex and the former are concave 
outwards. The strong opercular spime is the only spine on the head. 
Gills four, a slit behind the fourth. Gill rakers slender, longest three 
fourths as long as the eye, upper section of first arch with five and two 
rudiments and lower with thirteen and five rudiments. Gill membranes 
scarcely united, free from the isthmus. Pseudobranchixw small. Vertical 
fins united. Dorsal origin above the base of the pectoral. Anal origin 
below the nineteenth ray of the dorsal. Caudal extending farther back 
than dorsal and anal, narrow, pointed. Pectorals simple, short, four fifths 
as long as the head. Ventrals filamentary, one fifth longer than the 
head, bases close together below the humeral symphysis; ray bifid, parts 
separate nearly to the base, outer reaching to the anal origin, inner longer 
and reaching to the tenth or twelfth ray of the anal.  Snout to vent 
about one third of the total length. Pyloric caeca sixteen, of which there 
are several pairs below the intestine near the stomach. Scales very small, 
covering body and head. Lateral line distinct, near the dorsal fin, about 
eight scales distant, disappearing near the end of the tail. 
Brownish; margins of fins darker or, with the greater portion of the 
caudal, blackish, the bases of dorsal and anal and the tip of the caudal 
being light. Belly and lower portions of head more or less silvery. 
Length six inches and a half. 
Station, Latitude, Longitude. Depth. Temperature. Bottom. 
3389 FOM6 45OONe 79° 56’ 30” W. 210 fathoms 48.8° F. Gn. M. 
3391 7° 33' 40’ N. 79° 43/ 20" W. 153 rf 55.8° F. Gu. M. 
TloLCOMYCTERONUS gen. n, 
Closely allied to Neobythites, but differing in absence of preopercular 
spines, in ventrals and in pectorals, The body is compressed, high at the 
