NO. 1924. NEW PHILIPPINE ANACANTHINE FISHES—RADCLIFFE. 109 



situated near the edge of the hypercoracoid, a shallow fossa extending 

 backward toward center of bone ; scales small, deciduous, unarmed, 

 striae well developed; 9 scales from last dorsal ray to and including 

 lateral line; lateral line arched anteriorly, becoming median at a 

 distance from tip of opercle equal to length of head. 



First dorsal spine small, concealed, above base of pectoral, second 

 about 0.33 length of head, rays of first dorsal forked at tip and 

 articulated; interval between dorsals scarcely greater than space 

 separating successive rays; second dorsal rays much better devel- 

 oped than those of anal; base of ventrals an eye diameter nearer 

 origin of anal than tip of snout, outer ventral ray 1.72, slightly longer 

 than remaining rays; pectoral about 1.33. 



Color in alcohol: Ground color chocolate; scales, top and sides of 

 head grayish; edges of jaws and opercle, inside of opercle and mouth, 

 and fins brownish black. 



Type.— C&i. No. 72925, U.S.N.M., 44 cm. in length, taken with a 

 beaiii trawl at station 5423 Gat. 9° 38' 30" N.; long. 121° 11' 00" E.), 

 near Cagayan Island, Jolo Sea, at a depth of 508 fathoms, on a bottom 

 of gray mud and coral sand. 



This species resembles R. nipponica Jordan and Gilbert, from Japan. 

 In the Philippine form the interorbital is much narrower, being less 

 than or equal to horizontal diameter of eye, and the eye is larger, less 

 than 0.25 length of head. Our specimens were taken at depths of 

 182 to 508 fathoms. 



Subfamily M:ACIiOXJRIlSr.S:. 



Genus HYMENOCEPHALUS Giglioli. 



HYMENOCEPHALUS LONGIPES Smith and Radcliffe, new species. 



Plate 23, fig. 1. 



Dorsal 11,10-100; anal 101; ventrals 8; pectorals 15. 



Head 5.65 in total length, pointed, elongate, slightly resembUng 

 that of H. longibarlis (Giinther), crests and membranes roofing the 

 canals firmer than in related species, middle length of head at posterior 

 margin of pupil, breadth of head 1.88 in its length; body arched, 

 greatest depth, at origin of first dorsal, 7 in total length; tail long, 

 tapering ; eye 2.95, subcircular, orbital rims not as markedly expanded 

 as in related species; interorbital 5, narrow, rugose; snout 3.69, 

 nearly as long as eye, rather pointed ; nostrils close to eye, a narrow 

 membranous strip of skin separating the two apertures; suborbital 

 very narrow, its width less than diameter of pupil; mouth large, 

 slightly oblique, lower jaw included; maxillary 1.68, extending 

 slightly beyond vertical from posterior margin of eye; mandibular 

 barbel absent; teeth in jaws small, villiform, in narrow bands; gill 

 membranes forming a free fold across the isthmus ; no traces of pseu- 



