﻿CCELACANTHID^l. 409 



Genus GRAPHIURUS, Kner. 



[Sitzungsb. k. k. Akad. Wiss. Wien, math.-naturw. CI. vol. liii. 

 pt, i. 1866, p. 155.] 



Supplementary caudal fin prominent ; the rays of all the fins 

 broad, expanded, distally pointed, and closely articulated almost to 

 the base ; preaxial rays of the first dorsal and caudal fins tuber- 

 culated. Scales and head-bones tuberculated. 



So far as known, this genus comprises only one small species, 

 of which there are no specimens in the Collection : — 



Graphiumis callopterus, R. Kner, Sitzungsb. k. k. Akad. Wiss. 

 Wien, math.-naturw. CI. vol. liii. pt. i. (1866), p. 155, 

 pi. i. ; 0. M. Eeis, Palseontographica, vol. xxxv. (1888), 

 p. 67, pi. v. figs. 9, 10. — Upper Keuper ; Eaibl, Carinthia. 

 [Imperial Geological Survey, Vienna.] 



Genus DIPLURUS, Newberry. 



[Ann. New York Acad. Sci. vol. i. 1878, p. 127.] 



Supplementary caudal fin prominent, with much elongated 

 pedicle ; fin-rays robust, closely articulated in the distal half ; pre- 

 axial rays of the first dorsal and caudal fins with spinous tubercles. 

 Scales and head-bones irregularly striated. 



So far as known, this genus comprises only one large species, of 

 which there are no specimens in the Collection : — 



Diphmu longicaudatus, J. S. Newberry, loc. cit. p. 127, and Foss. 

 Fishes Trias, N. Jersey and Connecticut (Mon. U. S. 

 Geol. Surv. no. xiv. 1888), p. 74, pi. xx. — Trias ; New 

 Jersey and Connecticut, U. S. A. [Columbia College, 

 New York.] 



Genus UNDINA, Minister. 



[Neues Jahrb. 1834, p. 539.] 



Syn. Holophagus, Sir P. Egerton, Figs. & Descrips. Brit. Organic 

 Remains, dec. x. (Mem. Geol. Surv. 1861), p. 19. 



Teeth absent on the margin of the jaws, but a few hollow, conical 

 teeth within. Supplementary caudal fin prominent ; the rays of 

 all the fins broad and robust, often expanded, and closely articulated 

 in the distal portion ; small, upwardly-pointing denticles on the 

 preaxial rays of the first dorsal and caudal fins. External bones 

 and scales superficially ornamented with tubercles or fine interrupted 

 ridges of ganoine : parafrontal and circumorbital bones plate-like, 

 without superficial excavations. 



