164 



rROCEEDING^ OF THE NATIONAL MUSEU2I. 



VOL. 51. 



those species formerly referred to Chalinura, such as C. simula, with 

 a large, nearly terminal mouth, and other characters closely ap- 

 proacliing the typical species of iXematonurus, including further the 

 enlarged outer series of teeth in the upper jaw and the single series 

 of the lower jaw. The other extreme is typified by such species as 

 (J. nasutus Giinther, with small, inferior mouth, and villiform 

 bands of teeth in the jaws. The form of the snout, the serration of 

 the dorsal spine, the spination of the scales, and other characters are 

 also widely variable, but apparently do not mark natural divisions 

 of the genus. C. holotrachys Giinther^ seems to approach Coelo- 

 rhynchus in the form of the snout and the ridges of the head. C. 

 hyostomus (Smith and Radcliffe)- differs from all other species of 

 the genus in having the anus remote from the anal fin. 



The shoulder girdle is naked in all the species of C ory phaenoldes 

 and Nematonurus examined. 



9. CORYPHAENOIDES MARGINATUS Steindachner and Dbderlein. 



Coryphaenoides marfrinntns Steindachner and Doderlein, Fische Japans, 

 vol. 4, 1887, p. 284. 



The large type of this species, 53 cm. long, was well described by 

 Steindachner and Doderlein. Smaller specimens differ markedly in 

 the long filament of the dorsal spine, which is more than twice the 

 length of the head in some specimens. The spine is also short in the 

 young of about 30 mm. The serrations of the dorsal spine are more 

 numerous in the young, which is an unusual condition, as the reverse 

 is usually true ; the serrations are also much stronger in the young. 



1 Ann. Mag. Nat. Hist., vol. 2, 1878, p. 24 ; Challenger Reports, vol. 22, Deep-Sea Fishes, 

 p. 136, pi. 28, fig. 13. 



2 Radcliffe, Proc. U. S. Nat. Mus., vol. 43, 1912, p. 121, pi. 27, fig. 1. 



