202 BULLETIN OF THE 



DICROLENE, new genus. 



Diagnosis. — Body ln'otuliform, luoderately compressed ; head somewhat 

 compressed, with mouth hirye (in the type species extending nearly to tlie 

 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 iiarrow villiform bauds in the jaws on the 

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

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

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

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

 arranged in tM^o 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 jiosterior third of the body. Stomach siphonal. 

 Pyloric casca few, rudimentary. Intestine shorter than body. 



13. Dicrolene introniger, new species. 



Several specimens of a species of JJicnlcnc were obtained from Stations 

 325 and 326. 



Body moderately compressed, its dorsal and anal outlines approaching at 

 an cfjual angle the horizontal axis, and tapering to a narrow point, wliich 

 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 origui of the anal. The lateral line 

 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 heiglit one sixth of standard length. 



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

 upon by the upper margins of the orbit. At the posteiior upper mai'gin 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 ec[uidistant spines much weaker than that of the operculum. Large 

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

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

 lateral line. Moutli large : its cleft considerably longer than half the length 

 of the head, and the maxillary extending lieliind the vertiial from the posterior 

 margin of the orbit. The posttnior poilion of llie maxillary much expanded, 

 its width at the end e([Ual to three fourths the diameter of the eye. L'^'pon its 



