﻿CHIM^ERID^:. 87 



Leptomylus coohi, Es D. Cope, Proc. Amer. Phil. Soc. vol. xi. 

 (1871), p. 384. — Greensand ; New Jersey. 



Leptomylus forfex, E. D. Cope, Vert. Cret. Form. West (Rep. 

 U.S. Geol. Surv. Territ. vol. ii. 1875), p. 281.— Green- 

 sand ; New Jersey. 



Genus CALLORHYNCHUS, Gronow. 



[Zoophylacium Gronov. 1763, pt. i. p. 31.] 



Snout with a cartilaginous prominence, terminating in a cutaneous 

 flap ; tail heterocercal. Mandibular tooth more or less massive, 

 with a well-defined thick band upon the outer aspect immediately 

 below the oral margin ; anterior and outer tritors absent or minute ; 

 median tritor well developed. Palatine tooth robust, with a well- 

 defined thickening upon the outer aspect immediately above the 

 oral margin ; a single large tritor, bifurcated anteriorly, occupying 

 the greater part of the oral surface. Vomerine teeth more or less 

 quadrate in side view. Dorsal fin-spine laterally compressed, 

 smooth or longitudinally striated, with a double series of posterior 

 denticles. Head-spine of male short, arched, with a terminal 

 cluster of denticles. 



Callorhynchus hectori, Newton. 



1876. Callorhynchus hectori, E. T. Newton, Quart. Journ. Geol. Soc. 



vol. xxxii. p. 329, pi. xxi. figs. 6-9. 

 1878. Callorhynchus hectori, E. T. Newton, Chimseroid Fishes Brit. 



Cret. Rocks (Mem. Geol. Surv., Monogr. iv.), p. 41, pi. xii. 



figs. 11, 12. 

 1888. Callorhynchus hectori, J. W. Davis, Trans. Roy. Dublin Soc. [2] 



vol. iv. p. 41, pi. vii. figs. 14, 15. 



Type. Right palatine tooth : British Museum. 



Palatine tooth slightly differing from that of the recent C. ant- 

 arcticus in the more forward production of the two divisions of the 

 tritor. 



Form. Sf Loc. " Lower Greensand : " Amuri Bluff, New Zealand. 



P. 2301. Type specimen. By exchange, 1876. 



