266 
SELACHII. 
P. 2793, P. 2794. Seventeen teeth, two having the central eminence 
cleft, and two with the crown divided near one extremity 
(PI. IX. fig. 3). Ennislcillen Coll. 
Hybodus reticulatus, Agnfisiz. 
1822. Fossil jaw with a triple row of teeth, II. T. De la Beclie, Tran."*. 
Geol. Soc. [2] vol. i. p. 44, pi. v. fig. -3. 
18.37-43. IlyhoduK retir-ulattis, L. Agassiz, I’oiss. Foss. vol. iii. pp. 50, 
180, pi. ix. figs. 1-0*, pi. xxiv. lig. 26, pi. xxii. a. figs. 22, 2.3. 
(?) 18.37. Ilyhodns /ormosws, L. Agassiz, fo»n.c(y. p.51, pi. ix.figs. 10, 11. 
Type, Associated teeth, cartilage, and dorsal spines; Oxford 
Museum. 
Teeth narrow, with a relatively high crown, the median eminence 
and all the lateral cones slender and sharply pointed ; superficial 
coronal wrinkles fine and numerous, often not extending to the 
apex. In the anterior and principal teeth, the height of the median 
eminence is often equal to two-thirds or oven three-quarters of the 
long diameter of the tooth ; and this cone is almost invariably much 
bent both backwards and laterally. The root is of very loose 
texture. 
Form. ^ Loe. Power Lias : Lyme Eegis, Dorsetshire. 
P. 3163. Crushed head, showing the partially distorted outlines of 
one ptery go-quadrate cartilage and a number of scattered 
teeth. Ennielcillen Coll. 
40335. Portion of crushed head, showing shagreen and a few of 
the anterior teeth. Some of the teeth (PI. X. figs. 16-18) 
are of a more prehensile character than any figured by 
Agassiz. Purchased, 1867. 
P. 2198. Small specimen of associated cartilage, shagreen, and 
teeth. Egerton Coll. 
P. 2198 a. Portions of the cartilages of the jaws, associated with a 
few teeth, and one “ Sphenonchvs.” Egerton Coll. 
P. 2198 h. Two groups of teeth. Egerton Coll. 
P. 2203 a. Fragmentary teeth associated with two “ Spihenonclnl’ 
Egerton Coll. 
P. 2203 h. Three broken teeth, associated vith fragments of sha- 
green and two “ Sphenowhi.” Egerton Coll. 
^ Some of these spines mny pertain to Acrodus. 
