244. MESSRS. BRADY, PARKER, AND JONES 
substance shows itself under many different phases; and in several genera itis not un- 
common to meet with varieties having the test beset with needle-shaped points instead of | 
the stouter exostoses such as the tubereles and spines more frequently seen. Thus there 
are aculeate varieties of Lagena, Nodosaria, and Dentalina; and even in Uvigerina 
and Bulimina a disposition is manifested to assume the prickly condition, though in 
the latter genera it affects only certain portions of the test. From the close connexion 
of these types with Polymorphina, it is a matter of some surprise that no specimens of the 
genus (in a normal form) have hitherto been described with this peculiarity of surface, a 
circumstance probably due in part to the delicacy and perishable nature of the aculei and 
their liability to be worn down or otherwise obscured. 
Herr E. von Sehlicht, in his work on the Foraminifera of the Septaria-clay of Pietzpuhl 
(pl. xxxiv. figs. 1-3), has figured a single specimen of this acerose variety, but it is in 
the eervicorn or tubulose condition. 
Distribution.—The figure last alluded to seems to warrant the assumption that Poly- 
morphina hirsuta dates as far back as the early Tertiary period. Our fossil specimens 
were obtained from the Crag of Sutton, near Colchester; and we have a single recent 
example, which was found adhering to a clam-shell from the West Indies. 
POLYMORPHINA ORBIGNIT, Zborzewski, sp. (Plate XLII. figs. 38, a—o.) 
Polymorpha corcula spinosa, Soldani, 1791, Testaceographia ac Zoophytographia, vol. i. part 2, pls. 109-111. 
? Misilus aquatifer, de Montfort, 1808, Conchyl. Systématique, vol. i. p. 294, 74° genre. 
Raphinulina Humboldtii, Zborzewski, 1834, Nouv. Mém. Soc. Imp. Nat. Moscou, vol. iii. p. 311, pl. 28. 
fig. 1, a. 
Apiopterina D’Orbigni, id. ibid. p. 311, pl. 28. fig. 2, 6. 
Guttulina damecornis, Reuss, 1845, Verst. bóhm. Kreid. 1* Abtheil. p. 40, pl. 13. fig. 85. 
Globulina horrida, Reuss, 1846, ibid. 2* Abtheil. p. 110, pl. 43. fig. 14. 
GI. tubulosa, D'Orbigny, 1846, For. Foss. Vien. p. 228, pl. 13. figs. 15, 16. 
Aulostomella pediculus, Alth, 1849, Haidinger's Naturw. Abhandl. vol. iii. p. 264, pl. 13. fig. 17. 
A. horrida, id. ibid. p. 264. 
Globulina horrida, Reuss, 1850, Haidinger's Naturw. Abhandl. vol. iv. p. 43, pl. iv. fig. 8. 
Polymorphina communis (in part), Parker and Jones, 1857, Ann. & Mag. Nat. Hist. 2 ser. vol. xix. p. 283, 
pl. 11. fig. 34. 
P. fistulosa, Williamson, 1858, Rec. For. Gt. Br. p. 72, pl. 6. fig. 150. 
? Globulina tubulifera, Bornemann, 1860, Zeitschr. deutsch. geol. Gesellsch. vol. xii. p. 16, pL 6. fig. 10. 
Polymorphina lactea, var. tubulosa, Parker and Jones, 1860, Q. J. Geol. Soc. vol. xvi. p. 302 (table) ; 
Parker and Jones, 1862, in Carpenter's Introd., Appendix, p. 311. 
P. tubulosa, Brady, 1864, Trans. Linn. Soc. Lond. vol. xxiv. p. 473; Brady, 1865, Nat. Hist. Trans. 
Northumberland and Durham, vol. i. p. 99. 
P. lactea, var. tubulosa, Parker and J ones, 1865, Phil. Trans. Roy. Soc. vol. clv. p. 362, pl. 13. fig. 52, a-d ; 
M. Sars, 1865, Forekommende fossile Dyreleminger, Qvartærperioden, p. 62. 
P. tubulosa, Alcock, 1867, Proc. Manchester Phil. Soc. vol. vi. p. 85; M. Sars, 1868, Vidensk.-Selsk- 
Forhandlinger for 1868, p. 248; Jones, Parker, and Brady, 1866, Monogr. Crag Foram. pl. I- 
figs. 70-76. . 
fers.—Shell free or adherent. General form variable; ou oblong, or com- 
