152 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 51. 



posterior margin of orbit; premaxillary teeth in a band consisting 

 of an outer portion with moderate teeth, not closely set, including 

 the entire band anteriorly, but narrowing posteriorly ; and an inner 

 portion of specialized teeth, much finer and more closely set than 

 those of the outer portion, and including the entire band posteriorly, 

 but disappearing at the end of the anterior third of the band; the 

 two portions separated by a groove, which is less distinct than that 

 found in B. antrodes; the change in size of the teeth of the two por- 

 tions also less abrupt than in B. antrodes, an intermediate portion 

 being indicated, but poorly defined; mandibular band much nar- 

 rower, with a small symphyseal knob; barbel minute and slender; 

 branchiostegals 7; gill-openings extending forward to below pupil; 

 19 smooth gill-rakers on the lower limb of the outer arch, the longest 

 half the interorbital width; pseudobranchiae rudimentary, covered 

 with skin, located at the edge of a deep conic pit. Coracoid fora- 

 men on the suture between the hypercoracoid and the hypocoracoid.^ 

 Fifty pyloric caeca (in the paratype), the longest 2.3 in head. 



Lateral line extending nearly parallel to the dorsal outline of the 

 body for a distance greater than the postorbital length of the head, 

 thence obliquely downward to a point behind the origin of the anal, 

 and then straight along the tail, below the middle of its depth. 



First dorsal spine rudimentary, its distance from the end of the 

 occipital spine 2.4 in the distance from the end of the occipital spine 

 to the tip of the snout (2.6 times in the paratype ; 2.25 timesin the type 

 of B. nrppom'cus) ; the second spine slender, round, and smooth, with 

 a short slender filament, its length 2.4 in head ; interdorsal space very 

 short; second dorsal much better developed than the anal, high 

 throughout its extent; origin of anal under twelfth ray of second 

 dorsal, its distance from anus 2 in orbit (2.5 in paratype) ; ventral 

 rays broken, the outer one weak, probably not reaching past anus 

 when entire ; pectoral without a filament, its length 1.7 in head (1.6 in 

 paratype), the first ray short, flexible, unbranched and inarticulate, 

 the second ray also unbranched. Ventral inserted slightly more an- 

 teriorly than the base of the pectoral or the origin of the dorsal. 



Color in alcohol light grayish-brown, the breast and belly not 

 darker; branchiostegal membranes light, becoming dusky opposite 

 the opercle; buccal, branchial, and peritoneal cavities blackish, ex- 

 cept for a narrow whitish margin on the inner side of the branchios- 

 tegal membrane. First dorsal, pectorals and ventrals dusky; pecto- 

 rals and ventrals slightly overlaid with a bluish-gray color; second 

 dorsal and anal whitish anteriorly, shading into bluish-black pos- 

 teriorly. 



1 Hypercoracoid said to be perforate In B. nipponicvs. 



