386 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
3. BATHYGADUS ENTOMELAS, new species. 
Type-specimen.—Cat. No. 78211, U.S.N.M., a female specimen, 
220emm. long (a pseudocaudal developed), from Albatross station 
5619, in Molucca Passage, East Indies; depth, 435 fathoms; dredged 
with a specimen of B. filamentosus. - 
The body is more slender and less compressed than in B. spongi- 
ceps, the width over the pectoral being more than half the greatest 
depth. 
The head, though wide and cavernous, is much narrower and less 
spongy than in the species of the subgenus Bathygadus. The dorsal 
contour, not strongly arched behind the occiput, is straight from that 
point forward to the tip of the premaxillary spine; the evenly curved 
Fig. 2.—BATHYGADUS ENTOMELAS. ‘TYPE. 
ventral contour is less strongly angulated than in the species of the 
B. cottoides type. The orbit is larger than in the preceding species; 
its length is contained 4 times in the head, or 1.1 times in the least 
interorbital width, which is equal to the length of the snout; inter- 
orbital 3.7 in head. The least suborbital width is contained 2.4 in the 
interorbital. The two limbs of the opercle end in very weak spines, 
the upper of which is flat; the lower, slender. The interopercle is 
formed much as in B, antrodes, having the lower margin concave, 
and the bluntly rounded posterior flap just visible behind the pre- 
opercular margin. The mouth is only moderately oblique, more 
nearly horizontal than that of B. cottoides and its allies. The upper 
jaw extends slightly beyond the vertical from the hind orbital mar- 
gin, its length being contained 1.8 times in the head. The teeth, simi- 
lar to those of B. spongiceps, are coarser than those of B. furvescens; 
the mandibular band, which is about one-third as wide as the pre- 
maxillary band, is composed of but two or three irregular rows of 
