388 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



the head is of firmer texture; the distance between the head and 

 the anus in B. entomelas is equal to the length of the head behind 

 the anterior nostril, but in B.- furvescens is equal to the length of 

 the head behind the middle of the eye; the teeth are coarser and 

 in narrower bands on the jaws; the scapular foramen pierces the 

 shoulder girdle at a lower point, being in contact with the suture 

 between the hypercoracoid and the hypocoracoid ; and, finally, the 

 orbit is noticeably larger, although the type has been compared, in 

 the preparation of the following table, with both smaller and larger 

 Philippine specimens of B. furvescens. 



Table shotting size of orbit in Bathygadus entomelas and B. furvescens. 



Orbit, in head 



Orbit in snout 



( >rl>it in interorbital. 

 Orbit in post orbital . 



entomelas. furvescens. 



4.0 

 1.1 

 1.1 

 1.9 



4. 5 to 5. 

 1.2 to 1.35 

 1.2 



2. 2 to 2.0 



Measurements in hundredths of length to anus (84 mm.). — Length 

 of head, 59; length of orbit, 16; least distance between orbits, 17; 

 least suborbital width, 7; distance between orbit and preopercle, 29; 

 length of snout, 18; length of upper jaw, 34; depth of body, 41; 

 width of body over pectoral bases, 2G; distance from origin of anal 

 to center of anus, 7 ; from anus to base of outer ray, 39 ; from ventral fin 

 to anteroventral end of pectoral girdle, 27; length of first dorsal 

 base, 17; length of longest gill-rakers, 8. 



Only the type-specimen is known to us. 



(entomelaS) in reference to the wholly black branchial cavity.) 



4. BATHYGADUS FURVESCENS Alcock. 



Bathygadus furvescens Alcock, Journ. Asiatic Soc. Bengal, vol. 43, pt, 2, 

 1894, p. 128; Illustrations of the Zoology of the Investigator, Fishes, 

 pi. 16, fig. 1, 1895; Desc. Cat. Indian Deep-Sea Fishes, 1899, p. 121. 



Bathygadus melanobranchus Bbaueb, Die Tiefsee-Fische, 1900, p. 272. — 

 AYebek, Die Fische cler tfiboya-Expedition, May, 1913, p. 112. 



Contrary to the suggestion of Alcock and to the opinion of Brauer, 

 this species appears to be distinct from the Atlantic B. melano- 

 branchus Vaillant, 1 having a decidedly smaller eye, according to the 

 measurements of Vaillant, Collett, Alcock, and Brauer. Our study 

 of the material which is here referred to B. furvescens strongly con- 

 firms the view that the two species are quite distinct. 



For the purpose of more accurate comparison we present a descrip- 

 tion of our Philippine specimens, which were collected at the fol- 

 lowing,' stations: 



1 Vaillant, Exp. Sci. Trav. Talisman, 1888, p. 206, pi. 18, fig. 1 ; Collett, Poissons de 

 L'Hirondclle, 1896, p. 88. 



