202 BULLETIN OF THE 



DICROLENE, new genus. 



Diagnosis. — Body brotuliform, luoclerately compressed ; head somewhat 

 ct)nipressed, with mouth hirge (in the type species extending nearly to the 

 posterior margin of the eye). The tip of the maxiUary 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 lieyond the upper jaw. Jaws 

 nearly et^ual in front. Teeth in narrow villiform bands in the jaws on the 

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

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

 rakers rather long, not numerous. I'.seudobranchia! absent. A small, .separate 

 caudal fin, much prolonged. Dorsal and anal tins 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 venti'al 

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

 Avith 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 cceca 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 nairow point, which 

 forms the base of the cauilal fin. Scales small, aliout 110 rows lietween 

 the branchial opening and tlie tail, and aljout 27 transverse rows counting 

 upward and foi'ward obliquely from the origin (jf 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 height one sixth of standard length. 



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

 upon by the upper margins of the orl)it. At the postei'ior u]iper margin of 

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

 spine at the upper angle of the o])erculuni, its exposed portion as long as half 

 the diameter of the eye. Preoperculum, on its lov,-er 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 large cavities extending 

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

 lateral line. Mouth large : its cleft consideralily longer tlian half the length 

 of the head, and the maxillary extending l>eliinil the vertical from the posterior 

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

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



