ON THE GENUS POLYMORPHINA. 218 
Polymorphine constitute a remarkable and distinguishing feature, though elsewhere in 
that formation they are small and scattered. Lastly, in the Glacial beds of the west and 
north of Scotland, of Norway, and of Canada the type still abounds, and in the Posttertiary 
clays immediately underlying the peat in the fen districts of Lincolnshire and Northamp- 
tonshire numbers of minute specimens are found in a scarcely fossilized condition. 
POLYMORPHINA LACTEA, Walker and Jacob, sp. (Pl. XXXIX. figs. 1, a—c.) 
(Normal form ; transverse section nearly circular.) 
Serpula tenuis ovalis levis, Walker and J acob, 1784, Test. Min. p. 2, pl. 1. fig. 5. 
S. lactea, W. and J., fide Kanmacher, 1798, Adams's Essays, 2nd ed. p. 634, pl. 24. fig. 4. 
Vermiculum lacteum, Montagu, 1803, Test. Brit. p. 522. 
Serpula lactea, Maton and Raekett, 1807, Trans. Linn. Soc. vol. viii. p. 246; Pennant, 1812, Brit. Zool. 
vol. iv. p. 363; Turton, 1819, Conch. Dict. p. 156. 
Vermiculum lacteum, Fleming, 1822, Wern. Mem. vol. iv. p. 566, pl. 15. fig. 6. 
? Polymorphina (Globulina) ovata, D'Orbigny, 1826, Ann. Se. Nat. vol. vii. p. 266; Soldani, Testaceo- 
graphia, vol. ii. pl. 112. figs. g, g’- 
? Arethusa lactea, Fleming, 1828, Hist. Brit. Anim. p. 234. 
? Globulina Caribea, D'Orbigny, 1836, Foram. Cuba, p. 180, pl. 2. figs. 7, 8. 
Guttulina Plancii, D'Orbigny, 1839, Voyage dans l’ Amér. Mérid. p. 60, pl. 1. fig. 5. 
Renoidea oblonga, Brown, 1839, Conch. Illust. p. 3, pl. 56. figs. 16, 17. 
Vermiculum lacteum, Macgillivray, 1843, Moll. Aberd. p. 37. 
Polymorphina lactea, id. 1843, ibid. p. 320. 
Arethusa lactea, Thorpe, 1844, Brit. Mar. Conch. p. 233. : 
Globulina lachryma, Reuss, 1845, Verstein. bóhm. Kreid. pt. 1, pp. 40, 110, pl. 13. fig. 83; Alth, 1849, 
Haidinger's Abhandl. vol. iii. p. 263, pl. 13. fig. 16; Reuss, 1850, ibid. vol. iv. p. 48, pl. 5. fig. 9. 
Polymorphina lactea, Jones, 1854, in Morris's Cat. Br. Foss. 2nd edit. p. 40. 
Pyrulina ovulum, Ehrenberg, 1854, Mikrogeologie, pl. 31. figs. 35, 96. 
Strophoconus ovum (in part), id. ibid. pl. 20, $ 2, fig. 3, and pl. 26. fig. 21. 
S. spicula (in part), id. ibid. pl. 26. fig. 20. 
S. lazum, id. ibid. pl. 25. fig. 15, and pl. 31. fig. 26. 
Polymorphina Muensteri, Reuss, 1855, Sitzungsb. Akad. Wissen. Wien, vol. xviii. p. 249, pl. 8. fig. 80. 
P. ovulum, id. ibid, p. 250, pl. 6. fig. 63. 
P. Roemeri, id. ibid. p. 245, pl. 6. fig. 64. 
P. deformata, id. ibid. p. 246, pl. 6. fig. 66. 
P. turgida, id. ibid. p. 246, pl. 6. fig. 67. 
P. lactea (typica, in part), Williamson, 1858, Rec. For. Gt. Br. p. 71, pl. 6. fig. 147. 
P. lactea, var. communis, id. ibid. p. 72, pl. 6. figs. 153-155. 
Guttulina diluta, Bornemann, 1860, Zeitschr. deutsch. geol. Gesellsch. vol. xii. p. 160, pl. 6. fig. 11. 
Polymorphina lactea, Parker and Jones, 1859, Ann. N. H. Ser. 3, vol. iv. p. 336; 1860, Q. J. Geol. Soc. 
vol. xvi. p. 454, pl. 20. fig. 44; iid. ibid. p. 302, table; iid. 1862, in Carpenter's Introd. Appendix, 
p. 311; Brady, 1864 (in part), Trans. Linn. Soc. Lond. vol. xxiv. p. 473; Brady, 1865 (in part), 
Nat. Hist. Trans. Northumberland and Durham, vol. i. p. 99. 
P. lactea (typica), Alcock, 1865, Proc. Lit. € Phil. Soc. Manchester, vol. iv. p. 206; Sars, 1865, Foss. 
. fra Qvarteerperiod. pp. 55, 62, 65, 68, 85, 91; Jones, Parker, and Brady, 1866, Monogr. 
Crag Foram. pl. 1. fig. 48; Brady, 1868, Trans. Geol. Soc, Glasgow, vol. ii p. 125, &c.; Sars, 
1868, Vidensk.-Selsk. Forhandlinger for 1868, p. 248. 
2F2 
