LAMNID.E. 
359 
teeth ; internal face smooth. Crown attaining a maximum height 
of about 0'03, expanded laterally at the base, the sharp edges 
extending to its inferior limit ; lateral denticles absent, or mere 
asperities in the anterior teeth, very minute in the others. 
J'hrm. Zoe. Cenomanian (Cambridge Greensand) : Cambridge- 
shire. 
46362. Five teeth, with imperfect roots, forming the type speci- 
mens. The crown of one anterior tooth measures 0'03 in 
height, and the outer face is slightly convex. 
Pttrchated, 1875. 
28109. Three small examples, one showing a slight longitudinal 
median elevation of the outer coronal face. 
Presented hij James Carter, Esq., 1852. 
41915. Four dental crowns. Purchased, 
35130. Eight specimens. Purchased, 1859. 
The following specimens may belong to the so-called Odontasj)is 
studeri, Pictet ‘ (Pictet & Campiche, Foss. Terr. Cretace St. Croix, 
1858, p. 90, pi. xi. figs. 19-23), from the Xeocomian of Switzer- 
land ; but the evidence is insufficient for satisfactory comparison : 
P. 5759. Five imperfect teeth ; Neocomiau, near Folkestone, Kent. 
The teeth from the Xeocomian of Switzerland, named Lamna 
(Odonlaspis) {jracilis, L. Agassiz (Poiss. Foss. vol. iii. 1843, p. 295, 
pi. xxxvii. a. figs. 2—4), are also perhaps referable to this genus ; and 
teeth of the same form, from the Lower Cretaceous of Apt, Vaucluse, 
are recorded hy E. Arilaud (Bull. Soc. Gw)l. France, [3] vol. x. 
(1882), p. 133)'-‘. Gibbes’ and Giebel* identify the species with 
S. suhulata. 
Possibly also may be placed here a detached dental crown, from 
the White Chalk of Manganischlak, Caspian Sea, named OxyrMna 
^nrfustidens by E. von Eichwald (Geogn.-palseont. Bemerk. Halbinsel 
Manganischlak, 1871, p. 66, pi. iv. figs. 4, 5). 
* This seems to be the species provisionally named Odontaspu desorii, Pictet, 
in tlie Arehiv. Sci. Pbys. et Nat. 1858, p. 240. 
“ Teetb from Ibe Bnixellian of Belgium are also assigned to this species by 
T. C. Winkler, Arehiv. Mus. Teyler, vol. iii. (18V4), p. 298, pL vii. fig. 3. 
* H. W. Gibbes, Joum. Acad. Nat. Sci. Philad. [2] voL i. (1849), p. 198. 
* C. G. Giebel, Fauna cl. Vorsr., Fische (1847), p. 362. 
