PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 483 
Dorsal gray. In front of the seventh dorsal the upper third poste- 
rior to the upper two-thirds dark brown. Spots of yellow, large, 
elongate, on or near the rays. Adipose fin whitish brown or yel- 
low; a large group of bright yellow, confluent spots at the base. 
Pectorals sepia colored with rosy and purplish iridescence. 
Viscera.—Stomach small, siphonal, barely more than a loop in the 
very large intestine. - Alimentary canal short, stomach and intestine 
when stretched out at full length extending from the diaphragm to the 
caudal. A loop in the intestine immediately posterior to the stomach. 
Liver with two lobes, nearly equal in length, light chestnut-brown. Gall- 
bladder large, pendant, pear-shaped, with long duct. Swim-bladder 
simple, with thick muscular walls, strongly attached to roof of abdominal 
cavity by numerous root-like appendages, resembling somewhat those 
of Pogonias. Spleen two-thirds as long as gall-bladder. 
CHAULIODONTIDA. 
41. Chauliodus Sloanii, Schneider. 
Chauliodus Sloanii, SCHNEIDER, Bloch. Syst. Ichth. 1801, p. 430, tab. Ixxxv (as 
C. setinotus). 
Chauliodus Sloaniit, GUNTHER, Cat. Fish. Brit. Mus. v, 1864, p. 392. 
A single individual, No. 26165, 105°" long, was taken from station 
892, in 487 fathoms. The only other specimen recorded is that from 
the stomach of a codfish from George’s Banks, preserved in the museum 
of the Essex Institute. 
Radial formula of No. 26165: D. 6; A. 12. 
SCOPELID. 
42. Myctophun, sp. 
A species, apparently undescribed, was obtained in several of the deep 
hauls. lt is reserved for comparison with numerous other specimens of 
the group, as yet unelaborated, obtained by the Commission from the 
deep waters of the Atlantic. 
MICROSTOMID 4. 
Hyphalonedrus chalybeius, new genus and new species. 
Numerous specimens (No. 26092) of a form closely related to Argentina 
were taken, September 13, at stations 876 and 878, 120 and 142 fathoms. 
They are considered to represent a new generic type.* 
HYPHALONEDRUS, new genus. 
A genus of Microstomatid fishes. Body rounded, terete. Cleft of 
mouth extending under the anterior third (at least) of the orbit. Eye 
large. Teeth in the jaws small, sharp, on the edges of the bony lips. 
Tongue entirely smooth. Tip of lower jaw projecting, Dorsal fin short, 
inserted midway in space betw een insertions of pector als and ventr als, 
*Etymology : ipanoc= — under the sea i Evedpoc— — a dweller. 
