REPORT ON THE HETEROPODA. 
45 
5. Ladas planorboides, Forbes. 
1843. Ladas planorboides, Forbes, Report Brit. Assoc., p. 186. 
Habitat . — fEgean Sea. 
c: L. testa pellucicla, alba, lsevi, compressa, carinata, exalata, aufractibus 4. Diam. 0 X V 
This is all the information respecting this species which is given by Forbes. It is 
impossible to identify it from this description, and therefore it seems advisable to reject 
it entirely. 
6. Helicophlegma candei, d’Orbigny. 
1841. Helicophlegma candei , d’Orbigny, Sagra’s Hist. Cuba, Moll., vol. i. p. 100, pi. xi. 
figs. 15, 17. 
1859. „ ,, Clienu, Man. Conch., vol. i. p. 122, figs. 529, 530 (reduced copy 
of d’Orbigny). 
Habitat . — Antilles (d’Orbigny). 
This form is probably the embryonic stage of a Gastropod such as Lamellaria, &e. 
D’Orbigny ( loc . cit.), conjecturing its distinctness from Helicophlegma ( = Oxy gyrus), 
proposed the genus Brownia for its reception. 
Genus Oxy gyrus, Benson. 
1835. Oxygyrus, Benson, Joum. Asiat. Soc. Bengal., vol. iv. p. 174. 
1836. Helicophlegma , d’Orbigny, Voy. Amer. ra^rid., vol. v. p. 168 (as subgen.). 
1837. Oxygyrus, Benson, op. cit., vol. vi. p. 316. 
1839. Helicophlegma, d’Orbigny, Hist. Nat. Canaries, Moll., p. 35. 
1841. „ id., Sagra’s Hist. Cuba, Moll., vol. i. p. 98. 
1841. Ladas, Cantraine, Mem. Acad. Sci. Bruxelles, vol. xiii. p. 37. 
1842. Helicophlegma, d’Orbigny, Paleont. fran§., Terr, cret., vol. ii. p. 19. 
1843. Ladas, Forbes, Report Brit. Assoc., pp. 132, 186. 
1844. „ Philippi, Enum. Moll. Sicil., vol. ii. p. 205. 
1850. Oxygyrus, Gray, Fig. Moll. Anim., vol. iv. p. 101. 
1853. „ Philippi, Handbuch, p. 285. 
1854. „ H. and A. Adams, Gen. Moll., vol. ii. p. 92. 
1854. ,, Woodward, Man. Moll. p. 201. 
1856. ,, Troschel, Gebiss d. Schnecb., vol. i. p. 41. 
1857. Oxygyrus, Gray, Syst. Arrang. Moll., p. 133. 
1859. Helicophlegma, Chenu, Man. Conch., vol. i. p. 122. 
1862. Oxygyrus , Macdonald, Trans. Roy. Soc. Edin., vol. xxiii. pi. ii. figs. 2, 2 , 3, 5e, 5 f. 
1866. „ Keferstein, Bronn’s Thierreich, vol. iii. pt. 2, p. 850. 
1868. Ladas, Weinkauff, Conch. Mittel., vol. ii. p. 430. 
1873. „ id., Cat. Europ. Meer. Conch., p. 44. 
1883. Oxygyrus, Tryon, Struct. Syst. Conch., vol. ii. p. 351. 
1883. „ Fischer, Man. Conch., p. 582. 
