598 PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1885. 



The gill-rakers are rudimentary, there being 11 below the angle of the 

 arch. 



Bathygadus cavernosus, u. a. 



The type, number 37337, is a young specimen, 162 millimeters long, 

 obtained by the Albatross at station 2398, north latitude 28° 45', west 

 longitude SQo 26', at a depth of 227 fathoms. 



The body is stoutish, its greatest height (23™"^) contained 7 times in 

 total length. 



The scales are moderate, deciduous, cycloid, with no visible armature, 

 about 8 rows under the base of the first dorsal. 



Length of head (28'"'") about 6 in total length. The bones of the head 

 are very soft and cavernous, in many places without muscular covering, 

 spongy. Interorbital area doubly concave with a spinous medial ridge; 

 its greatest width (10'""') about 2| in the length of the head. 



Postorbital portion of head (13"^"') about half its length, 1^ as long 

 as eye, which is circular, its diameter (10™'") contained 2|- times in the 

 length of the head. 



Snout broad, very obtuse, its width at nostril nearlj^ equal to inter- 

 orbital width, its length (6'"'") 4f times in that of the head, l^ostrils 

 normal. 



Teeth in both jaws in villiform bands, very small; a naked space at 

 the symphysis of the intermaxillary; vomer and i^alatine toothless. 

 Gill-rakers very short, minute and rather numerous ; about 18 below the 

 angle of the anterior arch. Pseudobranchiae absent. Barbel two-fifths 

 as long as the eye. 



First dorsal composed of 2 spines, the first of which is minute, in- 

 serted at a distance from the snout (28"'™) equal to the length of the 

 head ; the second as long as the head without the snout, and 10 branched 

 rays; its base (lO'"™) equal to diameter of eye. Second dorsal almost 

 rudimentary, its rays remarkably short, about 133 in number ; its dis- 

 tance from the first dorsal half the length of head. 



Anal much higher than second dorsal, its distance from the snout 

 (46"'"') contained about 3^ times in the total length. About 27 rays in 

 a space equal to length of head. Anterior rays longest, in length 

 about three-fourths of the diameter of the eye. 



Pectoral inserted under the first branched ray of the first dorsal, its 

 length (20'""') equal to twice that of the eye and about two-thirds 

 length of head. 



Ventral slightly behind the pectoral, its first ray filamentous, reach- 

 ing to the base of the tenth anal ray ; it consists of 11 rays. 



Color gray, with silvery tints on sides ; the abdomen and lips dark. 



Bathygadus macrops, u. s. 



The type, number 37339, was taken at station 2396, north latitude 

 280 34', west longitude 86° 48', at a depth of 335 fathoms, by the steamer 

 Albatross. Its length is 305 millimeters. 



