294 
SELACHII. 
raised, only slightly convex. Most of the following specimens may 
be assigned to this species. 
(i.) Anterior dorsal Jin-spines. 
28282. Large crushed specimen in matrix. Purchased, 1853. 
29012. Incomplete specimen. Purchased, 1854. 
P. 2206. Imperfect pyritized spine. Egerton Coll. 
P. 2166 a. Imperfect specimen, exserted about 0’24. Ecjerton Coll. 
P. 2750. Much crushed spine, showing few denticles, exserted 0*4. 
Enniskillen Coll. 
P. 2803-4. Two imperfect specimens. Enniskillen Coll. 
P. 5007. Fine specimen, exserted about 0 f 26 ; the posterior face 
almost flat, and the denticles large and alternating. 
Presented by J. E. Lee, Esq., 1885. 
P. 5868. Spine with very large denticles, 0-37 in length. 
P. 2822. Type specimen of Hybcdus carinatus , Agassiz l , probably 
referable to the young of Acroclus anningice. 
Enniskillen Coll. 
P. 2815, P. 2824. Two similar spines. Enniskillen Coll. 
P. 3167. Doubtful small spine, with widely spaced nodose ribs, 
associated with a portion of the posterior spine. 
Enniskillen Coll. 
P. 2167. Small spine, with ornament very similar to that of 
No. P. 2733. Egerton Coll. 
(ii.) Posterior dorsal Jin-spines. 
P. 491. Specimen figured by Agassiz, Poiss. Foss. vol. iii. pi. viii. b. 
fig. 4 ( Hybodus curtus ). Egerton Coll. 
P. 2808. Specimen figured by Agassiz, tom. cit. pi. viii. b. fig. 5 
(Hybodus curtus ) ; Keynsham, near Bath. 
Enniskillen Coll. 
P. 2807, P. 2809. Two imperfect examples, the second labelled 
“ Hybodus curtus ” by Agassiz. Enniskillen Coll. 
P. 2821. Small spine, 0*2 in total length, perhaps correctly placed 
here. Enniskillen Coll. 
1 Poiss. Foss. vol. iii. (1837), p. 52, pi. ix. figs. 13, 14. 
