386 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



3. BATHYGADUS ENTOMELAS, new species. 



Type-specimen* — Cat. No. 78211, U.S.N.M., a female specimen, 

 220 mm. long (a pseudocaudal developed), from Albatross station 

 5619, in Molucca Passage, East Indies ; depth, 435 fathoms ; dredged 

 with a specimen of B. flame ritosus. 



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 bflt two or three irregular rows of 



