410 
sELAorni. 
Soc. Gcol. France, [3] vul. viii. (1880), i>. 457, pi. xiii. 
fig. 2. — U. Cretaceous (Carentonian) ; Charente, France. 
Lamna undulata, E. Sismonda, tom. cit, p. 47, pi. ii. figs. 23, 24. 
— Middle Tertiary ; Piedmont. 
Fragmentary teeth of Lamna from the Chalk of Sweden are 
also figured by S. Nilsson, Petrif. Suocana, 1827, pi. x. fig. 1 ; and 
a tooth from the Tertiary of Arkansas is figured in I). D. Owen, 
First Hep. Oool. lleconn. N. Counties of Arkansas, 1858, pi. ix. 
fig. 7. 
A species, L. (Otodus') woodwardii, is founded upon a vertebra 
from the Cambridge Greensand, by C. Ilasse, Pala 5 ontogr. vol. xxxi. 
(1884), p. 8, pi. ii. figs. 13-15; another vertebra from the Ceno- 
manian of Kursk, llussia, is named Olodiis prerdator, E. von Eich- 
wald, Bull. Soc. Lnp. Nat. Moscou, 1853, pt. i. p. 221 ; and other 
vertebra;, from the Rolling Downs Formation, North Queensland, 
are described as Lamna daviesii by II. Etheridge, Jun., Proe. Linn. 
Soc. N. S. Wales, [2] vol. iii. (1888), p. 15ti, pi. iv. figs. 2, 3. 
In his work, Naturl. Syst. Elasmobr., Besond. Thcil (1882), 
C. Basse describes vertebra; of Lamna from the Pliinerkalk of 
Strehlen, near Dresden (p. 220, pi. xxviii. figs. 8, 0), tbo Upper 
Eocene of Kressenberg, Bavaria (p. 220, pi. xxviii. fig. 7), and of 
Helmstedt, Brunswick (p. 219, pi. xxviii. figs. 10-13), and from tho 
Crag of Antwerp (p. 219). 
An example from tho Samland Eocene is also described by 
F. Noetling, Abh. Geol. Speeiulk. Preussen u. Thiiring. Staaten, 
vol. vi. i>t. 3 (1885), p. 09, pi. x. fig. 4. 
Various vertebra; from the Upper Cretaceous and Tertiaries are 
also assigned to “Otoefas” (C. Basse, op. cit. p. 200, pi. xxvii.), 
which is placed with Crossorhinus and Oimjhjmostoma in the 
Scylliolamnidoc. Some connection between certain forms of Otodus 
and Sfjuatina is also suspected by C. Basso, Morphol. Jahrbuch, 
vol. ii. (1870), p. 474. 
Tho so-called Lamna lanceolata, J. W. Davis (Trans. Roy. Dublin 
Soc. [2] vol. iv. 1888, p. 20, pi. iii. fig. 12), from New Zealand, is 
founded upon a tooth evidently not Selachian. 
Genus CARCHARODON, Miillor & Bcnle. 
[Syst. Beschreib. Plagiostom. 1841, p. 70.] 
Second dorsal fin and the anal very small. A pit at tho root of 
the caudal fin, which has the lower lobe well developed ; side of tho 
tail with a keel. Teeth large, erect, triangular, and serrated. 
