280 DEEP SEA FISHES. 
detected on the specimens. Skin glandular, thickly beset with small papille. 
No pyloric appendages. A female of three and one half inches is filled with 
mature eggs. 
Dorsal and anal near the caudal, from which they are separated as in 
species of Stomias; dorsal origin slightly forward of the anal, base of anal 
extending a little farther back than that of dorsal. Ventrals widely sepa- 
rated, little forward of the middle of the entire length, as long as the head. 
Pectoral a single ray, slender, filamentary, inserted low on the side. 
Intense black; mouth and stomach black ; fins lighter; small white dots 
scattered over the flanks and beneath. 
Station. Latitude. Longitude. Depth. Temperature. Bottom. 
3413 2° 34’ N. 92° 6’ W. 1360 fathoms 36° F. Glob. Oz. dk. Sp. 
3414 10° 14’ N. 96° 28’ W. 2232 ae 35.8° F. Gn. M. 
3418 16° 33’ N. 99° 52’ 30” W. ave 39° F. Br. S. bk. Sp. 
IDIACANTHID “i. 
Idiacanthus antrostomus. 
Idiacanthus antrostomus Gilb., 1890, P. U. S. Mus., XIIT, 54. 
Br. r. 12; D. 55-57; A. 33-34; V.6; Vert. ca. 79. 
Very long and slender, serpentiform, tapering comparatively little back- 
ward, moderately compressed, narrow in the caudal region for about one 
third of the total length. Head short, hardly more than one twelfth of the 
total leneth, little more than half as wide as deep. Snout medium, broad, 
blunt, nearly twice the length of the eye, with a sharp spine-like angle on 
the top; chin protruding, with a prominent symphyseal angle. Mouth very 
large, lower jaw as long as the head, angular with a sharp corner. Teeth 
raptorial, slender, somewhat compressed in the basal half, very sharp, 
depressible, varying in size, in single series, arranged in groups of three to 
five the anterior of each being small and the others increasing in size regu- 
larly to the hinder which in the middle of the jaw is as long as the eye, 
small at the symphyses, eighteen to twenty-one on each jaw; a pair con- 
sisting of a medium sized tooth and a small one at each side of the vomer 
and on each palatine; a similar pair at each side of the tip of the tongue 
and behind these at a short distance another pair at each side. Eye medium, 
half as long as the snout, one seventh of the length of the head, its centre 
on a vertical at the end of the anterior third of the maxillary. Nostrils near 
