CE9TR\CI0NIII).B. 
275 
P. 2082 b. Remains of a small head, showing part of the dentition 
and some of the branchial arches ; Pevensey Bay. 
Eyerton Cull. 
P. 2082 C. A very small head, with remains of the dentition, and 
indications of a very large massive ceratohyal cartilage ; 
Pevensey Bay. Eyerton Cull. 
P. 2082 d. Associated imperfect teeth ; Pevensey Bay. 
Eyerton Coll. 
40717-8. Two very imperfect heads, one large, the other small ; 
Bexhill. Purchased, 1807. 
40716. Very imperfect head ; Ilollington. Purchased, 1867. 
P. 2833. Portions of two associated dorsal fin-spines, probably of 
II. basanas, one shown, of the natural size, in PI. XII. 
fig. 5 ; Hastings. EnnisJcillen Coll. 
P. 2833 a, P. 2834. Proximal portions of two similar spines ; 
Hastings and Tilgate Forest. Ennisk-illen Coll. 
39254. Imperfect spine stouter and apparently distorted ; Hastings. 
Purchased, 1865. 
P. 5880. Two fragments of spines, probably of this species, from 
the Wealden, de.scribed as having been obtained from tho 
Chalk of Lewes, and named Hyhodus sulcatus, Agassiz, 
Poiss. Foss. vol. iii. p. 44, pi. x. b. figs. 15, 16. 
Mantell Coll. 
Hybodus sp. inc. (? strictus, Agassiz). 
/ 
The following teeth were obtained from the Purbeck Beds of the 
neighbourhood of Swanage, Dorsetshire, and may pertain, at least in 
part, to II. strictus, Agassiz', hitherto only' known by dorsal fin- 
spines. 
21349. High-crowned tooth, very suggestive of II. yrossiconus, with 
a single lateral cone on each side ; coronal surface smooth, 
merely wrinkled near the base. Also a fragmentary smaller 
tooth, with narrower principal cone. Purchased, 1 847. 
P. 5296. Incomplete abraded tooth, probably similar. 
21349 a. Fragment of a very largo tooth, showing the long first 
lateral cones. Purchased, 1847. 
* Poiss, Foss. Tol. iii. (1837), p. 45, pi. x. figs. 7-9. 
t2 
