272 
SELACHII. 
P. 5877. Ten imperfect teeth, mostly 
Gloucestershire. 
P. 4214. Two teeth ; Lansdown, Bath. 
32566. Three teeth ; Caen, Kormandy. 
small; Minchinhampton, 
Byne Coll. 
Enniskillen Coll. 
Tesson Coll . 
Cunnington Coll. 
Cunnington Coll. 
(ii.) Forest Marble. 
24770. Tooth; Wiltshire. 
28442. Three small teeth ; Stanton, Wiltshire. 
28441. Ten teeth, one showing the complete root; Wiltshire. 
Cunnington Coll. 
32355. Tooth; Malmesbury, Wiltshire. Purchased, 1857. 
30556. Two teeth; Afford, near Bath. Purchased , 1856. 
46340. Five teeth; Afford. Cunnington Coll. 
P. 2185. Two teeth; Afford. Egerton Coll. 
Hybodus ©btusus, Agassiz. 
1813. Hybodus obtnsus, L. Agassiz, Poiss. Foss. vol. iii. p. 186, pi. xxiii. 
figs. 43, 44. 
1875. Hybodus crassus, K. Fricke (non Agassiz), Falseontogr. vol. xxii. 
p. 393, pi. xxi. fig. 19. 
1887. Hybodus obtnsus, H. M. Platnauer, Aim. Rep. Yorks. Phil. Soc. 
p. 35, pi. i. figs. 1-16. 
Type. Detached teeth ; Caen Museum. 
Teeth with a high crown, moderately compressed. Median cone 
broad, sharply pointed in the anterior teeth, more obtuse in the 
posterior; lateral cones two or three in number, broad, high and 
pointed in the anterior teeth, considerably fused together in the 
posterior teeth. Coronal surface mostly smooth, with occasional 
faint wrinkles, and prominent excrescences at the base. 
A fine series of fifteen detached teeth is figured by Platnauer 
from the Corallian of Malton, Yorkshire. The same author also 
makes known an imperfect dorsal fin-spine, probably of this species. 
Form. 6f Loc. Bathonian : Caen, Normandy. Oxfordian : Hun¬ 
tingdonshire. Corallian: Yorkshire and Hanover. Lower Kim- 
meridgian : Oxfordshire and Dorsetshire. 
39205. Six teeth ; Coral Rag, Malton, Yorkshire. Purchased , 1865. 
35670-73. Four teeth; Coral Rag, Malton. Bean Coll. 
