CESTRACIOXTIDiE. 
275 
P. 2082 b. Remains of a small head, showing part of the dentition 
and some of the branchial arches ; Pevensey Ray. 
Egerton Coll. 
P. 2082 C. A very small head, with remains of the dentition, and 
indications of a very large massive ceratohyal cartilage; 
Pevensey Bay. Egerton Coll. 
P. 2082 d. Associated imperfect teeth ; Pevensey Bay. 
Egerton Coll. 
40717-8. Two very imperfect heads, one large, the other small; 
Bexhill. Purchased, 1867. 
40716. Very imperfect head ; Hollington. 
Purchased, 1867. 
P. 2833. Portions of two associated dorsal fin-spines, probably of 
II. hcisanus, one shown, of the natural size, in PL XII. 
fig. 5; Hastings. Enniskillen Coll. 
P. 2833 a, P. 2834. Proximal portions of two similar spines; 
Hastings and Tilgate Porest. Enniskillen Coll. 
39254. Imperfect spine stouter and apparently distorted ; Hastings. 
Purchased , 1865. 
P. 5880. Two fragments of spines, probably of this species, from 
the 5^ ealden, described as having been obtained from the 
Chalk of Lewes, and named Hyhodus sulcatus, Agassiz, 
Poiss. Loss. vol. iii. p. 44, pi. x. h. figs. 15, 16. ~ 
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 H. strictus, Agassiz 1 , hitherto only known by dorsal fin- 
spines. 
21349. High-crowned tooth, very suggestive of H. grossiconus, 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, 1847. 
P. 5296. Incomplete abraded tooth, probably similar. 
21349 a. Fragment of a very large tooth, showing the long first 
lateral cones. Purchased , 1847. 
1 Poiss. Foss. vol. iii. (1837), p. 45, pi. x. figs. 7-9. 
