Jordan: Elepiienor, A New Genus of Fishes from Japan. 333 



enlarged, while the first ten are graduated. {Cf. Plate LVIII, of 

 this article, lower figure.) The dorsal fin begins behind the eye. It 

 cannot be the same as the original P. carolinus. It is plainly a 

 Centropholis and it may stand as a new species, Centropholis goodei 

 Jordan. The ventral rays arc I, 5, as in Centropholis. 



The tj'pe-specimen of Bentenia cesticola is in the Imperial Museum 

 of Tokyo. In connection with the description of Jordan and Snyder, 

 Dr. Mitsukuri published a photograph of this example. A drawing 

 made from this photograph, with the torn vertical fins restored is 

 given on Plate LVI. In this photograph, an appendage resembling 

 the ventral fins appears under the lower jaw. Mr. Shigeho Tanaka, 

 ichthyologist of the Imperial University, has reexamined the type, 

 and finds this appendage to be a detached piece of the left branchio- 

 stegal membrane, torn loose by accident. The ventral fins were 

 described as "I, 5" and "jugular" by Jordan and Snyder. They do 

 not appear in this photograph and Mr. Tanaka says that they are 

 not present on the actual specimen, and he finds no scar where the 

 fins might have been torn off. Being very fragile, they have probably 

 been broken off in manipulation. 



If one of the dorsal spines is really enlarged in the type species of 

 Pteraclis, the genus Bentenia must be very close to it. The tip of the 

 shoulder-girdle, the presumable insertion of the ventral fins, is a little 

 farther forward in Bentenia. 



It is a curious fact that nearly all of the species noted in this paper 

 are each known from only a single specimen, and the others from very 

 few. As surface fishes of the ocean currents they are very rarely 

 taken, and are doubtless nowhere abundant. 



The PteradidcE, Pterocyidce, and Dianidce differ from the related 

 families in having all the dorsal rays simple, not jointed, nor branched. 

 In the Bramidcc, also closely related, the rays of dorsal and anal are 

 nearly all soft and articulate. 



The Velijeridce of Japan, resemble superficially the Pteraclidce, but 

 have a very different mouth-structure, and the posterior part of the 

 dorsal and anal is made up of soft rays, as in related families. 



The species here discussed may be recapitulated. 



