382 
SELACHII. 
Oxyrhina crassidens, Dixon. 
1843. Oxi/rhinn mantelli, Jj. Agassiz (errore), Poiss. Foss. vol. iii. 
pi. xxxiii. fig. C. 
1850. Oxyrhina crasaidens, F. Dixon, Foss. Sassex, p. 367, pi. xxxi. 
fig. 13. 
Type. Detached tooth ; Dritish Mu.scum. 
Teeth extremely robust and of very large size, sometimes attaining 
a total height of 0‘06. Main portion of the crown narrow with 
respect to the root, the coronal edges rapidly diverging outwards at 
the base and Tisually coarsely crimped ; outer coronal face irregularly 
convex, with few vertical wrinkles ; inner face extremely convex 
and smooth, or with minute basal wrinkles. 
Form. ^ Loc. Sononian : Sussex. 
25823. Type specimen ; Houghton. Dixon Ooll. 
25786. Two nearly complete anterior teeth and four dental crowns. 
Dixon Coll. 
25787. Very small dental crown. Dixon Coll. 
4577. Dental crown, figured by Agassiz, loe. cit. ; Lewes. 
Mantell Coll. 
49951. Dental crown ; Lewes. Capron Coll. 
49951 a. Base of tooth ; Arundel. Capron Ooll. 
Oxyrhina triangularis, Egerton. 
1845. Oxyrhina trlanytdaria, Sir P. Egerton, Quart. Journ. Oeol. Soc. 
vol. i. p. 109, woodcut. 
Type. Imperfect teeth ; British Museum. 
A very small species, founded upon the much compressed broad 
teeth mentioned below. 
Form, tf- Loc. Upper Cretaceous : Pondicherry, Madras, India. 
P. 594. Two dental crowns, one figured loe. cit. Egerton Coll. 
Oxyrhina desorii, Agassiz. 
1843. Oxyrhina deaorii, L. Agassiz, Poiss. Foss. vol. iii. p. 282, 
pi. xxxvii. figs. 8-13. 
184.3. Oxyrhina leptodon, L. Agassiz, tom. cit. p. 282, pi. xxxvii. figs. 3-6 
(? pi. xxxiv. figs. 1, 2). 
1847. Oxyrhina deaorii, R. W. Gibbes, Proc. Acad. Nat. Sci. Philad. 
p. 267. 
1849. Oxyrhina deaorii, E. Sismonda, Mem. R. Accad. Sci. Torino, [2] 
vol. X. p. 44, pi. ii. figs. 7-16. 
