452 



BULLETIN" 100, UNITED STATES NATIONAL MUSEUM. 



(maculatus, in reference to the large blackish spot which is located 

 just above and behind the pectoral fin in the series of species led by 

 C. maGulatus.) 



25. COELORHYNCHUS VELIFER, new species. 



Type-specimen. — Cat. No. 78216, U.S.N.M. ;' 251 mm. in total 

 Length (tail almost entire), 72 mm. to the anus. The type is an adult 

 male, and was dredged at Albatross station 5294 (data below). 



List of stations. 



This species, so abundantly dredged off southwestern Luzon, was 

 not collected so far south as were G. notatus and triocellatus, and 

 but one or two of the specimens of maculatus were obtained within 

 its known range. The species just named are obviously closely 

 allied, and are mutually characterized by the presence and the form 

 of the ventral fossa, a scaleless strip extending forward from the 

 peritroct to between the ventrals. 



The evidence at hand points to the possible conclusion that the 

 young of this species inhabit shallower water than the adults do, 

 although their vertical ranges overlap; only the young were ob- 

 tained at stations ' 5265 (135 fathoms), 526*8 (170 fathoms), and 

 5292 (162 fathoms) ; both the young and adult specimens were 

 dredged at stations 5289 (172 fathoms), 5291 (173) and 5293 (180) ; 

 only adults were collected at the following stations: 5297 (198 

 fathoms), 5296 (210), 5269 (220), and 5294 (244). 



This species, G. velifer, apparently attains a larger size than 

 does G. maculatus. 



Fin-rays— first dorsal, II, 9 (8 to 10) ; pectorals, 15 (15 to 17) ; 

 ventrals, 7. 



The body is slender, but more robust than in G. maculatus^ the 

 greatest depth being contained 1.6 (1.6 to 1.7) times in the head in 

 the adults (the young, as usual, are more slender) ; the width of the 

 body across the pectoral bases is nearly equal to the depth of the 



