314 
SELACHir. 
in longitudinal series, becoming fused into short ribs near the 
apex. 
Teeth unknown. 
Form. Log. Purbeck Beds : Swanage, Dorsetshire. 
23407. Nearly complete small spine, detached from matrix. 
Purchased, 1849. 
f 
35571. Crushed spine, 0-3 in length. Purchased , 1860. 
38496. Broader imperfect spine. Purchased, 1864. 
40652. Smaller crushed spine. Purchased , 1867. 
44829. Nearly complete spine, detached from matrix, the extremity 
abraded. Presented by Benjamin Briyht, Esq., 1873. 
P. 2209, P. 2209 a. ell-preserved large spine, and a less perfect 
smaller spine. Egerton Coil. 
P. 2859. An imperfect large spine, and two smaller specimens, 
one much abraded. Enniskillen Coll. 
Asteracanthus granulosus, Egerton. 
. 1855. Asteracanthus granulosus, Sir P. Egerton, Figs. & Descrips. 
Brit. Organic Remains (Mem. Geol. Surv.), dec. viii. pi. i. 
1859. Asteracanthus granulosus, Pictet & Campiche, Foss. Terr. Cre- 
c . tace St. Croix, p. 98, pi. xii. tig. 14. 
Type. Dorsal tin-spine ; British Museum. 
t Dorsal fin-spine very similar in form and proportions to that of 
A. verrucosus, but with the ornamental tubercles relatively smaller, 
rounder, and less closely arranged. 
Teeth unknown. 
Form. $ Loc. Wealden: Tilgate Forest, Sussex. L. Neocomian : 
Switzerland. 
P. 565. Type specimen. Egerton Coll. 
2688, 2704. Two fragments of larger spines, the second figured by 
Egerton, loc. cit. pi. i. figs. 2, 3. Mantell Coll. 
40166. Plaster cast of fragment described and figured by Pictet and 
Campiche, loc. cit.; L. Neocomian, St. Croix. 
Presented by Mons. Campiche, 1866. 
IT. Species founded upon detached teeth not yet correlated with the 
dorsal fin-spines. 
Strophodus magnus, Agassiz. 
1838. Strophodus magnus, L. Agassiz, Poiss. Foss.' vol. iii. p. 126, 
pi. xviii. figs. 11-15. 
