430 
sEijAonii. 
Cetorhinus dupouti, Hassc. 
1882. Selaclie dupmiti, 0. Ilasse^ Natiirl. Syst. Elawnobr., Ik'soncl. 
Theil, p. 241, pi. xxxii. figs. 6-8. 
Type. Detached vertebra ; Brussels Museum. 
A provisional species founded upon vertebrae very similar to those 
of the living Cetorhinus maximus, and in which the calcified con- 
centric rings are very numerous. 
Form, 4" Toe. Pliocene (Crag) : Antwerp, Belgium. 
P. 2316. Half of a typical vertebra, 0 095 in diameter, in section. 
By exchange, 1883. 
The following extinct species are also recognized upon imperfect 
evidence : — 
Cetorhinus auratus : Selache aurata, II. Lawley, Atti Soc. Toso- 
Sci. Nat. vol. iv. (1879), p. 109 ; F. Sacco, Bull. Soc. Gcol. 
Franco, [3] vol. xiv. (1880), p. 304. Hannovera aurata, 
P. J. van Benedcn, Bull. Acad. Boy. Sci. Belg. [2] vol. xxxi. 
(1871), p. 504, pi. ii. fig. 1(1; B. Lawley, Nuovi Studi, 
Pesci etc. Colline Toscano (1870), p. 44, pi. i. fig- 17 
Teeth resembling Selache maxima, B. Lawley, op. cit. p. 89, 
pi. i. fig. 11. — Pliocene; Belgium and Italy. [Founded 
upon donnal appendages of gill-arches (see A. Hannover, 
Overs, k. Danske Vidensk. Selsk. Forhandl. 1807, p- 40, 
woodcut).] 
Cetorhinus glauconiticus : Selache glauconitica, F. Noetling, Abh. 
Geol. Spccialk. Proussen u. Thiiring. Staaton, vol. vi. pt. 3 
(1885), p. 49. Selache sp., C. Ilnsse, Paloeontogr. vol. xxxi. 
(1884), p. 10, pi. ii. fig. 18. — Uppfsr Eocene ; Palm- 
nicken and Samland, Prussia. [Founded upon a vertebra.] 
Cetorhinus vetmius : Selache vetusta, 0. G. Costa, Palcont. Begno 
Napoli, pt. ii. (1854-50), p. 58, pi. vii. figs. 59, 03 (00). 
Miocene ; Naples. [Tooth.] 
The so-called Selache manzonii, B. Lawley (loc. cit. vol. v. (1881), 
p. 107, woodcuts), from the Miocene of Monte Titano, Bopublic of 
San Marino, is founded upon a very doubtful tooth. 
Largo dermal sj)ines identical with those affixed to the claspers of 
the existing male Cetorhinus maximvs are described from the Crag 
of Antwerj) by P. J. van Benedcn, Bull. Acad. Boy. Sci. Belg. [2] 
vol. xliL (1876), p. 294 (with plate). The following are similar 
specimens from the English Crag : — 
