360 
SELACHII. 
P. 5770. Abraded tooth, of the form named Lamna JutUoni, Davis; 
formation unknown, New Zealand. 
43019. Five fragmentary small teeth ; formation unknown, Canter- 
bury, New Zealand. 
Presented hy J. Davies Enys, Esq., 1870. 
The following is one of the hiudermost teetb, probably of this 
species : — 
P. 5743. Small tooth, with three pairs of lateral cones; Heersian 
Beds, Or[i-le-Grand, Belgium. 
Presented hy Q. F. Harris, Esq., 1888. 
Odontaspis contortidens, Agassiz. 
184.3. Lamna {Odontaspis) contortidens, L. Agassiz, Poiss. Foss. vol. iii. 
p. 294, pi. xxxvii. a. figs, 17-23. 
1849. iMmna {Oduntaspis) contortidens, E. Sismonda, Rlem. II. .\ccad. 
Sci. Torino, [2] vol. x. p. 48, pi. ii. figs. 25-28. 
1849. Lamna (Odontaspis) contortidens, 11. W. Oibbes, .lourn. ,\cad. 
Nat. Sci. Pliilad. [2] vol. i. p. 197, pi. xxvi. fig. 1 19. 
1857. L.amna ( Odontaspis) contortidens, O. G. Gemmellaro, AttiAccad. 
Gioenia Sci. Nat. [2] vol. xiii. p. ,320, pi, i. a. fig. 13 a (P pi. vi. a. 
f. 18-20). 
1864. Lamna (Odontaspis) contortidens, O. G. Costa, Ann. Accad. Aspir. 
Nat. Napoli, [,3] vol. iii. p. 30, pi. v. fig. 2. 
1877. Lamna contortidens, A. Locard, Faune Terr. Tert. Moy. Corse, p. 7. 
1879. Lamna (Odontaspis) contortidens, J. Probst, Wiirtt. Jaliresh. 
vol. XXXV. p. 144, pi. ii. figs. 33-30. 
1879. Odontaspis contortidens, F. Bassani, Atti Soc. Veneto-Trent. Sci. 
Nat. vol. vi. p. 57. 
1882. Odontaspis contortidens, II. E. Sauvage, Mdm. Soc. Sci. Nat. 
Sa6ne-et-Loire, vol. iv. p. 60. 
Type. Detached teeth. 
Teeth slender, with delieate longitudinal strim upon the inner 
coronal face, and only distinguished from those of Odontaspis elerjans 
by the pronounced sigmoidal curvature of those occupying the ante- 
rior portion of the jaw. 
The teeth at least of the most anterior pair in the upper jaw of 
all species of Odontaspis exhibit considerable sigmoidal curvature; 
but ill 0. contortidens all the front teeth seem to bo thus character- 
ized, and in such the inward projection of the base of the root is 
much greater than in 0. eleyans. By Lo lion ‘ the species is iilaccd 
with 0. eleyans, and it docs appear to he the representative of this 
‘ Prtliiu. Mem. Poiss. Tort. Belg. 1871, p. 12. 
