202 BULLETIN OF THE 



DICROLENE, new genus. 



Diagnosis. — Body brotuliforin, moderately compressed ; head somewhat 

 compressed, -with mouth large (in the type species extending nearly to the 

 posterior margin of the eye). The tip of the maxillary much dilated. Eye 

 large, placed close to the dorsal profile. Head -with supraorbital spines : sev- 

 eral strong spines on the preoperculum, and one long spine at the upper angle 

 of the operculum. Snout short, not projecting beyond the upper jaw. Jaws 

 nearly equal in front. Teeth in narrow villiform bands in the jaws on the 

 head of the vomer, and on the palatines. Barbel none. Gill openings wide : 

 membranes not united. Gills four : gill laminae of moderate length. Gill 

 rakers rather long, not numerous. Pseud obranchise absent. A small, separate 

 caudal fin, much prolonged. Dorsal and anal fins long : rays of the pectoral fin 

 arranged in two groups : several of the lower rays being separate and much pro- 

 duced. Ventral fins close together, far in front of the pectorals. Each ventral 

 composed of a single bifid ray. Branchiostegals seven. Body and head covered 

 with small scales. Lateral line close to the base of the dorsal fin, apparently 

 becoming obsolete on the posterior third of the body. Stomach siphonal. 

 Pyloric caeca few, rudimentary. Intestine shorter than body. 



13. Dicrolene introniger, new species. 



Several specimens of a species of Dicrolene were obtained from Stations 

 325 and 326. 



Body moderately compressed, its dorsal and anal outlines approaching at 

 an equal angle the horizontal axis, and tapering to a narrow point, which 

 forms the base of the caudal fin. Scales small, about 110 rows between 

 the branchial opening and the tail, and about 27 transverse rows counting 

 upward and forward obliquely from the origin of the anaL The lateral bine 

 rudimentary, running near the base of the dorsal fin at a distance from it 

 less than the diameter of the eye, and apparently becoming obsolete on the 

 posterior third of the body. Body height one sixth of standard length. 



Head somewhat compressed, with llattish upper surface, which is encroached 

 upon by the upper margins of the orbit. At the posterior upper margin of 

 each orbit is a strong spine pointing backward and upward ; a long sharp 

 spine at the upper angle of the operculum, its exposed portion as long as half 

 the diameter of the eye. Preoperculum, on its lower posterior border, with 

 three equidistant spines much weaker than that of the operculum. Large 

 muciferous cavities in the bones of the head : a row of largo cavities extending 

 backward from the upper angle of the orbit, and continuous with those on the 

 lateral line. Mouth huge : its cleft considerably longer than half the Length 

 of the head, and the maxillary extending behind the vertical from the posterior 

 margin of the orbit. The posterior portion of the maxillary much expended, 

 its width at the end equal to three fourths the diameter of the eve. Upon its 



