MUSEUM OF COMPARATIVE ZOOLOGY. 155 
space equal to its own short diameter. The greatest diameter of the eye is 
contained six times in the length of the head. The mouth is oblique, curved, 
its posterior angle directly beneath the middle of the lower eye. Length of 
gape in that of head four times. The teeth are feeble, closely placed, a little 
stronger on the colored side. 
The nostril tubular, a little nearer to the lower eye than to the tip of the 
snout. 
The dorsal fin begins at a point over the middle of the upper eye, and con- 
tains about 90 rays to the middle of the base of the caudal. The rays about 
the middle of the fin are the longest, their height being a little more than 
i that of the body. The distance of the anal fin from the snout is contained 
32 times in total length. The longest anal rays are about the middle of the 
body ; their length is equal to that of the longest in the dorsal. The anal is 
connate with the caudal, and consists of 69-75 rays. 
The length of the median caudal rays is contained nearly seven times in the 
total length. The distance of the ventral from the snout is contained 43 times 
in the total length. It is separated from the anal by a distance equal to the 
long diameter of the eye. The number of ventral rays is four ; the longest ray 
is 34 times as long as head. 
Color grayish or brownish, with a sub-metallic lustre upon the scales when 
examined separately. The denticulations of the scales are dark and promi- 
nent, giving a clouded general aspect. Some of the smaller specimens (from 
Station 2318) have a few large irregular brownish blotches above and a dark 
subcircular blotch near the root of the tail, its diameter twice that of the eye. 
Colorless below. 
Radial formula: D. 90; A. 69-75; V.4; P. none. L. lat. 65. 
Specimens: “ Blake” Station xxm1.; 250 fms., off St. Kitts, W.I. ‘ Alba- 
tross”” Stations 2318, 2425, 2405, 2374. Off Key West, Fla., and between 
Delta of Mississippi and Cedar Keys, Fla. 
Monolene atrimana, n. sp. 
The length of the specimen described to base of caudal is 114 millimeters 
(xvi. “ Blake,” off Barbadoes, 288 fathoms). 
The height of the body (37 mm.) is one third of the total length without 
the snout, and equals four times the long diameter of the eye ; it also equals 
12 times the distance of the ventral origin from the snout. The height at the 
origin of the ventrals (29 mm.) equals about three times the length of the lower 
eye (9mm.). The least height at the base of the tail (8 mm.) equals 4 of 
the length of the mandible (10 mm.). The body is thin, its greatest width 
(45 mm.) equalling half the length of the eye. 
Scales ovate, or oblong, smaller than in M. sessilicauda, and without evident 
pectinations. The head is everywhere scaly, except on the lips and the ante- 
rior half of the snout. The scaling of the fins is essentially the same as in 
