410 
SELACHII. 
- 
Soc. Geol. Prance, [3] vol. viii. (1880), p. 457, pi. xiii. 
fig. 2.—TJ. Cretaceous (Carentonian); Charente, Prance. 
Lamna undulata , E. Sismonda, tom. cit. p. 47, pi. ii. figs. 23, 24. 
—Middle Tertiary ; Piedmont. 
Pragmentary teeth of Lamna from the Chalk of Sweden are 
also figured by S. Nilsson, Petrif. Suecana, 1827, pi. x. fig. 1 ; and 
a tooth from the Tertiary of Arkansas is figured in D. D. Owen, 
Pirst Pep. Geol. Peconn. N. Counties of Arkansas, 1858, pi. ix. 
fio* 7 
A species, L. ( Otodus ) woodwardii, is founded upon a vertebra 
from the Cambridge Greensand, by C. Hasse, Palseontogr. vol. xxxi. 
(1884), p. 8, pi. ii. figs. 13-15; another vertebra from the Ceno¬ 
manian of Kursk, Pussia, is named Otodus prcedator, E. von Eich- 
wald, Bull. Soc. Imp. Nat. Moscou, 1853, pfc. i. p. 221 ; and other 
vertebrae, from the Polling Downs Pormation, North Queensland, 
are described as Lamna daviesii by P. Etheridge, Jun., Proc. Linn. 
Soc. N. S. Wales, [2] vol. iii. (1888), p. 159, pi. iv. figs. 2, 3. 
In his work, Natiirl. Syst. Elasmobr., Besond. Theil (1882), 
C. Hasse describes vertebrae of Lamna from the Pliinerkalk of 
Strehlen, near Dresden (p. 220, pi. xxviii. figs. 8, 9), the Upper 
Eocene of Kressenberg, Bavaria (p. 220, pi. xxviii. fig. 7), and of 
Helmstedt, Brunswick (p. 219, pi. xxviii. figs. 10-13), and from the 
Crag of Antwerp (p. 219). 
An example from the Samland Eocene is also described by 
F. Noetling, Abh. Geol. Specialk. Preussen u. Thiiring. Staaten, 
vol. vi. pt. 3 (1885), p. 69, pi. x. fig. 4. 
Various vertebrae from the Upper Cretaceous and Tertiaries are 
also assigned to “ Otodus 97 (C. Hasse, ojo. cit. p. 206, pi. xxvii.), 
which is placed with Crossorliinus and Ginglymostoma in the 
Scylliolamnidae. Some connection between certain forms of Otodus 
and Squatina is also suspected by C. Hasse, Morphol. Jahrbuch, 
vol. ii. (1876), p. 474. 
The so-called Lamna lanceolata , J. W. Davis (Trans. Poy. 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, Muller & Henle. 
[Syst. Beschreib, Plagiostom. 1841, p. 70.] 
Second dorsal fin and the anal very small. A pit at the root of 
the caudal fin, which has the lower lobe well developed ; side of the 
tail with a keel. Teeth large, erect, triangular, and serrated. \ 
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