DIBRANCHUS ASPER. 95 
have two cusps, others three. Large tubercles occur at each side above 
the middle of the orbit and above its hind margin, also above the nasal sacs 
and in a series of five at the outer edge of the rostrum the median (ante- 
rior) one of which is three cusped. On the ventral surface the spines are 
very small and not in contact. A considerable number of small spines 
occur on the orbit. Lateral line distinct, deeply channeled; second papilla 
at each side of the symphysis of the lower jaws situated in front of the 
space between the first and the third. Fringes on the fleshy lobes between 
the spines at each side of each papilla of the lateral line feebly developed. 
Fins small; dorsal origin midway from snout to end of tail, fin two thirds 
as long as the distance from snout to nape; anal origin to end of snout 
equal to twice the distance from the first ray of the dorsal to the base 
of the caudal; caudal narrow, in length equal to twice the interorbital 
width of the head, rounded on the hind margin; pectorals shorter than the 
caudal, fringed; ventrals fringed, nearly one third as long as the head, 
narrow. 
Greyish black, apparently reddish or purplish in life, fins blackish; 
lower surface darker. A five-inch specimen described. 
Station, Latitude, Longitude. Depth. Temperature, Bottom. 
3431 23° 59' N. 108° 40’ W. 995 fathoms 37° F. Lt. br. M. glob. 
3364 5° 30’ N. 86° 8’ 30” W. lo) 9 °C: 38° F, Y1. glob. Oz. 
Dibranchus asper sp. n. 
brerOce Dy Ocul. 4c) VG. bo 149. C. 9. 
Though in the main this species resembles Dibranchus scaber, Plate 
XXIV., there is a number of features in which it does not agree with that 
species. The rostrum is shorter, and hardly extends forward of the lower 
jaw; the tubercle on the tip of the snout bends upward and curves back- 
ward ; the concavity on the top of the snout is deeper; and the subopercu- 
lar tubercle is more nearly longitudinal, z.e., it does not bend inward at the 
end so as to bring the compressed extremity with its pair of spines parallel 
with the backbone, but one of the spines points toward the gill opening, the 
other directly outward. In D. scaber the rostrum is longer and extends 
forward of the lower jaws, the rostral tubercle is straight and protrudes 
almost horizontally, the concavity on the top of the snout is not so deep, 
and the subopercular tubercle is bent inward so that the blade-like end 
extends one of its spines toward the head and the other backward. There 
