272 
SELACHII. 
P. 5877. Ten imperfect teeth, mostly small ; 
Gloucestershire. 
Minchinhampton, 
Byne Coll. 
P. 4214. Two teeth; Lansdown, Bath. Ennislillen Coll. 
32566. Three teeth ; Caen, Normandy. Tesson Coll. 
(ii.) Forest Marble. 
24770. Tooth ; Wiltshire. 
28442. Three small teeth ; Stanton, Wiltshire. 
28441. Ten teeth, one showing the complete root ; 
32355. Tooth ; Malmesbury, Wiltshire. 
30556. Two teeth; Atford, near Bath. 
46340. Five teeth ; Atford. 
P. 2185. Two teeth ; Atford. 
Cunnington Coll. 
Cunnington Coll. 
Wiltshire. 
Cnnnington Coll. 
Purchased, 1857. 
Purchased, 1856. 
Cunnington Coll. 
Egerton Coll. 
Hybodus obtusus, Agassiz. 
1813. Jlyhodm obtusus, L. Agassiz, Poiss. Foss. vol. iii. p. 186, pi. xxiii. 
figs. 43, 44. 
1876. Ilyhodus crassus, K. Fricko {non Agassiz), Palffiontogr. vol. xxii. 
p. 393, pi. xxi. fig. 10. 
1887. Ilyhodus obtusus, II. M. Platnauer, Ann. Hop. 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 speeies. 
Form. Loc. Bathonian ; Caen, Normandy. Oxfordian: Hun- 
tingdonshire. Corallian : Yorkshire and Hanover. Lower Kim- 
meridgian : Oxfordshire and Dorsetshire. 
39205. Six teeth ; Coral Bag, Malton, Yorkshire. Purchased, 1865. 
35670-73. Four teeth ; Coral Bag, Malton. Bean Coll. 
