376 
SELACHII. 
Alopecias hassei, F. Noetling, Abh. Geol. Specialk. Preussen u. 
Thiiring. Staaten, vol. vi. pt. 3 (1885), p. 75, pi. v. 
figs. 4 a-/.— Upper Eocene (Zone A x ); Samland, Prussia. 
Vertebrae from the Rupelian of Boom, near Antwerp, and 
Briisterort, N. Germany, have also been assigned to this genus by 
C. Hasse, Natiirl. Syst. Elasmobr., Besond. Theil (1882), p. 223, 
pi. xxix. figs. 22, 23. They are further remarked upon by 
F. Noetling, tom. cit. p. 78, pi. x. fig. 3. 
lAv^ 
J 
I 
L {X*f ivUlf * ’• 
Genus OXYRHINA, Agassiz. - . ,, : A 
j , [Poiss. Foss. vol. iii. 1838, p. 86 .] 
Second dorsal fin and the anal very small. A pit at the root of 
the caudal fin, which has the lower lobe much developed; side of 
the tail with a keel. Teeth large, anteriorly lanceolate, postero- 
laterally triangular and much compressed, without lateral denticles. 
Although only differing from Lamna in the prevailing absence of 
lateral denticles in the teeth, it is convenient, from a paleontological 
point of view, to retain Oxyrhina as a distinct genus; more especially 
as several forms of these teeth bear specific names identical with those 
applied to other teeth referable to Lamna proper. - ^ - 
f fJtr# . 
/''L % . f/$ Oxyrhina mantelli, Agassiz. * ^ 
1822. Squalus zygcena ?, G. A. Man tell, Foss. S. Downs, p. 227, pi. xxxii. 
figs. 4, 7, 8, 10, 11,26, 28. 
1839. Oxyrhina, H. B. Geinitz (ex Agassiz), Charact. Schicht. u. Petre- 
fiikt. sachs.-bohm. Kreidegeb. p. 12, pi. i. fig. 4 (in part). 
1843. Oxyrhina mantelli, L. Agassiz, Poiss. Foss. vol. iii. p. 280, 
pi. xxxiii. figs. 1-5, 7-9 (non fig. 6). 
1843. Lamna acuminata , L. Agassiz, tom. cit. p. 292, pi. xxxvii. a. 
fig. 54 (F non figs. 55-57). 
1845. Oxyrhina mantelli, A. E. Reuss, Verstein. bdlim. Kreideform. pt. i. 
p. 5, pi. iii. figs. 1, 3, 5, 6 (P figs. 2, 4). 
(?) 1849. Oxyrhina mantelli , R. W. Gibbes, Journ. Acad. Nat. Sci. 
Philad. [2] vol. i. p. 202, pi. xxvii. fig. 158. 
1850. Oxyrhina mantelli , F. Dixon, Foss. Sussex, pi. xxx. fig. 24. 
18g0. Lamna acuminata , F. Dixon, op. cit. pi. xxx. fig. 19. 
1852. Oxyrhina mantelli, P. Gervais, Zool. et Pal. Fran^ pi. lxxvi. 
figs. 3, 20. 
(?) 1852. Oxyrhina, R. Kner, Denkschr. k. Akad. Wiss. Wien, vol. iii. 
pi. xv. fig. 3. 
1856. Oxyrhina mantelli, C. E. Fischer, Allg. deutsch. naturh. Zeit. 
Dresden, n. s. vol. ii. p. 141, pi. ii. fig. 43. 
