DIBRANCHUS HYSTRIX. 93 
by ridges; nostrils small, anterior with a short tube, posterior transverse 
and larger. Eye large, as long as the snout; length less than the inter- 
orbital width. Crown slightly convex; interorbital space wide, concave, 
width equal to one and two thirds times the length of the snout. Mouth 
large, width equal to more than the distance across the orbits, more 
than one third of the width of the head, or contained one and one half 
times in the distance from snout to nape. Teeth in villiform bands 
on jaws and tongue, absent from vomer and palatines. Two gills, none 
on first arch; rakers short, rounded, tubercular, four on the first arch 
and five in front of the second; apertures medium, placed superiorly 
in the axilla. Subopercular tubercle strong, bent inward, bearing five 
spines, end tricuspid, one of the terminal cusps extending forward, one 
upward, and the longest one backward. Skin soft, thin; bones less 
firm than those of D. atlanticus. 'Tubercles mostly simple with long 
slender cusps and spreading striate bases, not closely placed, mixed with 
comparatively few small scales. As if to aid in locomotion some of 
the tubercles along the lower side of the edge of the disk are two 
to three cusped. Spinules such as appear on the bases of the tubercles 
on other species are not present. The strongest tubercles are in two 
series on the top of the tail, and in those at the sides of the disk. 
Small spines are loosely scattered over the ventral surface, and a few 
are seen on the tops of the orbits. The erect spines around the edge 
of the rostrum are comparatively large. Lateral line distinct, with deep 
channels, agreeing with the other species of the genus in regard to 
the forward position of the second papilla from the symphysis of the lower 
jaws, in the dermal flaps, and in the protecting spines at the sides of 
the papillae. 
Fins small; dorsal origin midway from occiput to base of caudal, 
or midway from front of orbit to end of caudal; anal small, slender, 
origin the length of the maxilla farther backward than the origin of the 
dorsal ; caudal narrow, length about four fifths of the distance from snout 
to occiput, hind margin rounded; pectorals rounded, fringed, shorter than 
the caudal; ventrals narrow, about as long as the maxilla. 
Color a rich dark chestnut to chocolate brown; fins black. 
Station. Latitude. Longitude. Depth. Temperature, Bottom. 
3375 9° 34! N. 82° 29’ W. 1201 fathoms 36.6° F. Gy. glob. Oz. 
3362 5°56! Ni. 85° 10’ 30” W. io. < 36.8° F. Gn. M.S. rky. 
3392 Toto 30 ONG 79° 40’ W. 1270 ~~ * 36.4° F. Hard. 
