BELLEROPHON. 
331 
of the genus, Odontom,aria elephcmtma, which is figured and slightly described by 
Dr. P. Romer,^ and which differs from it in its section being roughly octagonal 
instead of being oval. Hence, as far as can be judged from Romer's figure, it 
appears to be specifically distinct, though evidently very closely allied. 
X. Family — Bellerophontid^, M^Goy, 1852. 
1. Genus — Belleeophon, Montfort, 1808. 
The zoological position of this group of palaeozoic shells has been often altered. 
They were first supposed to belong to the Cephalopoda, then to the Heteropoda, 
but now they are generally placed low down among the Gasteropoda, being regarded 
as horizontally symmetrical shells akin to Pleurotomaria.. They extend from the 
Cambrian throughout the Palseozoic period, and have been found in these strata in 
almost every part of the world. 
1. Bellbrophon lineatus, Goldfuss MS. PL XXXI, figs. 3 — 6. 
?1781. Nautilit sans cloisons, <i?e ififpscA. Naturg. der Neiderdents, p. 27, pi. iii, 
fig. 22. 
1826. Bellebophon steiatus, de Ferussac. In d'Orbigny, Tabl. Cephal. ; Feru. 
Bull. (Sci. Nat.), vol. ix, p. 245. 
1826. — — d'Orhigny et de Ferussac. Ann. Sci. Nat., vol. vii, 
p. 140. 
1828. — — Keferstein. Teutschland, Band vi, p. 27. 
1832. — — ? Goldfuss. De la Beche's Handbook, German 
ed., p. 534. 
1832. — TTifDTJLATUs, Ooldfuss. Ibid., p. 534. 
1834. — STEIATUS, Keferstein. Nat. der Erdk., pt. 2, p. 430. 
1834. — TTiTDtrLATxrs, Keferstein. Ibid., p. 430. 
1835. — STEiATtrs, Bronn. Lethaea, p. 96, pi. i, figs. 11 a — c. 
1840. — LINEATUS, Goldfuss, MS. De Ferussac et d'Orbigny, Hist. 
Nat. Ceph., p. 192. 
1840. — STEIATUS, de Ferussac. De Ferussac et d'Orbigny, Hist. 
Nat. Ceph., p. 192 (Bellerophon), 
pi. i, fig. 11 ; pi. iii, figs. 11 — 17 ; 
pi. iv, figs. 1 — 5, and pi. vii, 
figs. 4, 5. 
? 1840. — SowEEBTi, de Ferussac et d'Orbigny. Hist. Nat. Ceph., 
p. 202, (Bellerophon) pi. v, 
figs. 19—23. 
1841. — STEIATUS, Phillips. Pal. Foss., p. 106, pi. xl, figs. 198 a, b. 
1 1876, F. Romer, ' Leth. Pal.,' pi. xxix, figs. 10 a, b. 
