MUSEUM OF COMPAKATIVE ZOOLOGY. 155 



space equal to its own short diamecer. 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 

 ^ that of the body. The distance of the anal fin from the snout is contained 

 3| 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 ia 

 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 4§ 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 3^ 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 xxiii. ; 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 

 If 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 (9 mm.). The least height at the base of the tail (8 mm.) equals f of 

 the length of the mandible (10 mm.). The body is thin, its greatest width 

 (4^ 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 



