296 
SELACHII. 
siderable elevation of the dental crown, and the angularity of the 
numerous branching superficial coronal wrinkles; lateral pro¬ 
minences in the known teeth distinct and large. 
Form. Sf Log. Bathonian : Gloucestershire. 
P. 5875. Perfect tooth, described by the present writer, he. cit ., and 
figured, of twice the natural size, in PI. XIII. figs. 8, 8 a ; 
Great Oolite, Minchinhampton. Byne Coll. 
Acrodus hirudo, Agassiz. 
1839. Acrodus hirudo , L. Agassiz, Poiss. Foss. vol. iii. p. 148, pi. xxii. 
fig. 27. 
1887. Acrodus hirudo, A. S. Woodward, Geol. Mag. [3] vol. iv. p. 102. 
Type. Detached tooth ; British Museum. 
Principal teeth about 0 025 in length. Coronal contour gently 
rounded, the surface marked by extremely fine wrinkles diverging 
from a central faintly-marked longitudinal groove. 
Form. Sf Loc. Wealden : Sussex. 
2706. Type specimen, inverted in the figure given by Agassiz; 
Tilgate Forest. Mantell Coll. 
P. 4994. A smaller more perfect tooth, described by the present 
writer, loc. cit., and shown, of twice the natural size, in 
PI. XIII. figs. 9, 9 a; Telham, near Battle. 
Presented by J. E. Lee, Esq., 1885. 
Acrodus ornatus, sp. nov. 
Type. Detached tooth ; British Museum. 
An imperfectly known species, founded upon the small tooth, 
shown, of thrice the natural size, in PI. XIII. fig. 10. The dental 
coronal contour is low and gently rounded, marked by a longi¬ 
tudinal median wrinkle ; the laterally directed wrinkles are short, 
stout, and marginal, but few extending to the middle line. 
Form. Sf Loc. Wealden; Isle of Wight. 
P. 5275, P. 5275 a. Type specimen and a more elongated abraded 
tooth ; Brixton. Fox Coll. 
Acrodus levis, A. S. Woodward. 
1887. Acrodus levis, A. S. Woodward, Geol. Mag. [3] vol. iv. p. 103, 
woodc. figs. 2, 3. 
Type. Detached teeth; British Museum. 
Principal teeth attaining a length of about 0‘013. Coronal con- 
