416 
SELACHII. 
1854—56. Carcharodon auriculatus, O. G. Costa, op. cit. pt. ii. p. 48, 
pi. v. fig. 5. 
1854-56. Carcharodon rectidens, 0. G. Costa, op. cit. pt. ii. p. 51, pi. v. 
fig. 4, pi. vi. fig. 2. 
1854-56. Carcharodon prochictus, 0. G. Costa, op. cit. pt. ii. p. 52, pi. y. 
fig. 1. 
1854-56. Carcharodon arcuatus, 0. G. Costa, op. cit. pt. ii. p. 56, pi. vi. 
fig. 4. 
1854-56. Carcharodon Iatissimus, 0. G. Costa, op. cit. pt. ii. p. 55, pi. y. 
fig. 8. 
1857. Carcharodon megalodon, G. G. Gemmellaro, Atti Accad. Gioenia 
Sci. Nat. [2] yoI. xiii. p. 299, pi. ii. a. 
1857. Carcharodon megalodon, var. siculus, G. G. Gemmellaro, tom. cit. 
p. 300, pi. iii. a. figs. 1-3. 
1857. Carcharodon megalodon , var. subauriculatus, G. G. Gemmellaro, 
tom. cit. p. 301, pi. iv. a. figs. 1 a- 3 a. 
1857. Carcharodon productus, G. G. Gemmellaro, tom. cit. p. 306, pi. v. a. 
figs. 3 a-5 a. 
1857. Carcharodon Iatissimus , G. G. Gemmellaro, tom. cit. p. 307, pi. iv. a. 
fig. 4. 
(P) 1861. Carcharodon heterodon, G. Micliellotti, Miocene Inf. Italie 
Septentr. (Mem. Soc. Holland. Sci.), p. 143, pi. xiv. figs. 8, 9. 
1865. Carcharodon crassus, 0. G. Costa, Paleont. Regno Napoli, 
Append, i. p. 102, pi. vi. fig. 1. 
1865. Carcharodon auriculatus, var. falciformis, 0. G. Costa, op. cit. 
Append, i. p. 104, pi. vi. fig. 2. 
1870. Carcharodon megalodon , F. Roemer, Geol. von Oberschlesien 
pi. xlviii. fig. 16. 
1871. Carcharodon megalodon , H. Le Hon, Prelim. Mem. Poiss. Tert. 
Belg. p. 7. 
(P) 1872. Carcharodon helveticus and Carcharodon turicensis, K. Mayer, 
Syst. Verzeichn. Verstein. Helvetian Scliweiz u. Schwabens, p. 35 
(names only) 1 . 
1875. Carcharodon megalodon , F. M'Coy, Prodr. Palmont. Victoria, 
(Geol. Sure. Viet.), dec. ii. pi. xi. fig. 4. //■ ■ c . " A 
1876. Carcharodon megalodon, rectidens, productus , and polygyrus, 
R. Lawley, Nuovi Studi Pesci, etc. Colline Toscane, pp. 22, 23. 
1877. Carcharodon megalodon , J. Leidy, Journ. Acad. Nat. Sci. Pbilad. 
[2] vol. viii. p. 253. 
1877. Carcharodon megalodon, K. Miller, Das Molassemeer Boden- 
seegeg. p. 65, pi. iii. fig. 72. 
1 Through the kindness of Prof. Mayer-Eymar, the writer has had the oppor¬ 
tunity of studying the original teeth thus named. They are insufficient for 
definite determination ; but the types of C. helveticus closely resemble the lower 
teeth of C. megalodon , and that of C. turicensis the hinder teeth of the same 
species. 
