754 PROCEEDINGS OF THE ACADEMY OF ^ [Nov., 



DESCRIPTION OF A NEW LANTERN FISH. 



BY HENRY W. FOWLER. 



MYCTOPHID^. 

 CENTROBRANCHUS gen. nov. 

 Type CcntrobrancJius choeroccpJialus sp. nov. 

 Close to Rhinoscopelus Liitken, but differing in the gill-rakers, which 

 are short sparse clusters of asperities on the first arch. 



{Khrpir^^ prick; iSpdyyo^^ giU-) 



Centrobranchus choerocephalus sp. nov. 



Rhinoscopelus coruscans Fowler, Proc. Acad. Nat. Sci. Phila., 1900. p. 498. 

 Near the Sandwich Islands. (Dr. William H. Jones.) (Not of Richard- 

 son.) 



Rhinoscopelus oceanicus Jordan and Evermann, Bull. U. S. Fish Comm., 

 1902 (1903), p. 168. (Not description. Part.) 



Head 3|; depth 5; D. 10; A. 18; scales 35 in a lateral series to base 

 of caudal ; about 6 scales in a transverse series at origin of rayed dor- 

 sal ; depth of head H in its length ; width of head 2^ ; snout 4i ; eye 3§ ; 

 interorbital space 3^; maxillary If; least depth of caudal peduncle 5. 



Body elongate, well compressed, slender and tapering posteriorly, 

 upper profile a little more convex anteriorly, and greatest depth about 

 origin of ventral. Caudal peduncle long, slender, and its more or less 

 even depth about 3^ in length from adipose fin. 



Head shaped somewhat like that of an Anchovy, upper profile a 

 little more convex especially at occiput, and well compressed. Snout 

 protruding beyond mouth, conic, and a little shorter than orbit. Eye 

 small, circular, about midway in depth and near first third of head. 

 Mouth large, inferior, maxillary narrow or slender, of even width, and 

 extending posteriorly well beyond orbit. Mandibular rami formed 

 of rather broad bones and extending far back like maxillary. Teeth 

 in jaws and on palatines minute, and in narrow bands. Vomer with 

 similar teeth, though a little more conspicuous. Tongue a short conic 

 protuberance in front of mouth. Interorbital space convex. A 

 slight mesial elevation in the internasal depression. 



Gill-opening extending forward opposite middle of orbit. Rakers 

 about 3-1-5 clusters or groups of small inconspicuous prickles on first 

 arch. Filaments small. Pseudobranchiae present. Isthmus narrow 

 and trenchant. 



