736 
THE VOYAGE OF H.M.S. CHALLENGER. 
Polystomella crispa, Linne, sp. (PI. CX. figs. 6, 7). 
“ Cornu Hammonis orbiculatum,” Plancus, 1739, Conch. Min., p. 10, pi. i. fig. 2. 
“Nautilus minimus,” Gaultieri, 1742, Index Test., pi. xix. figs. A.D. 
Nautilus crispus, Linne, 1767, Syst. Nat., 12th ed., p. 1162 — 275. 
“Nautilus spiralis geniculis crenatis,” Walker and Boys, 1784, Test. Min., p. 18, pi. iii. fig. 65. 
“Nautili striati communes ( crispi Linnsei),” Soldani, 1789, Testaceographia, voL i. pt. 1, p. 54, 
pi. xxxiv. figs. c.c. e.e. C.H.I. 
Themeon rigatus, Montfort, 1808, Conchyl. System., vol. i. p. 203, 51 e genre. 
Polystomella crispa, Lamarck, 1822, Anim. s. Vert., vol. vii. p. 625, No. 1. 
Vortidalis crispa, Defrance, 1824, Diet. Sci. Nat., vol. xxxii. p. 181. — Blainville, 1825, Mala- 
cologie, p. 375. 
Polystomella oweniana, d’Orbigny, 1839, Foram. Am6r. M£rid., p. 30, pi. iii. figs. 3, 4. 
55 
lanieri, 
Id. 
1839, Foram. Cuba, p. 74, pi. vii. figs. 12, 13. 
55 
crispa, 
Id. 
1846, For. Foss. Vien., p. 125, pi. vi. figs. 9-14. 
55 
flexuosa, 
Id. 
Ibid. p. 127, pi. vi. figs. 15, 16. 
crispa, Williamson, 1849, Trans. Micr. Soc. Lond., vol. ii. p. 159, pi. xxviii. 
strigilata, Schultze, 1854, Organ. Polythal., p. 64, pi. iv. 
spinulosa, Costa, 1856, Atti dell’ Accad. Pontan., vol. vii. pi. xix. fig. 14. 
55 
ornata, 
Id. 
Ibid. 
p. 215, pi. xix. fig. 16. 
55 
crispa, 
Id. 
Ibid. 
p. 212, pi. xix. fig. 17. 
55 
striolata, 
Id. 
Ibid. 
pi. xix. fig. 18. 
,, crispa, Williamson, 1858, Rec. For. Gt. Br., p. 40, pi. iii. figs. 78-80. 
,, „ Carpenter, 1862, Introd. Foram., p. 278, pi. xvi. figs. 4-6. 
,, „ Parker and Jones, 1865, Phil. Trans., vol. civ. p. 399, pi. xiv. fig. 24; 
pi. xvii. fig. 61, a. b. 
„ costifera, Terquem, 1882, Mem. Soc. geol. France, s4r. 3, vol. ii. M4m. III. p. 47, 
pi. ii. fig. 26. 
The typical Polystomella crispa has a thick biconvex test with sharp angular 
periphery. The septal bands and retral processes are both conspicuously developed, and 
the umbilical depressions are filled with a deposit of clear sliell-substance, convex or 
slightly umbonate externally, and more or less tubulated ; the aperture consists of a V- 
shaped row of pores at the inner margin of the septal face. 
There are few Foraminifera that have been so carefully and accurately studied as the 
present species, both with respect to the structure of the test and of the soft parts of the 
animal. Of the memoirs quoted in the foregoing synonymy, the reader interested in the 
subject may be especially referred to those of Williamson, Schultze, and Carpenter, which 
leave nothing to be desired in the completeness of their descriptions. 
Polystomella crispa is one of the most abundant shallow-water Foraminifera, though 
not quite so widely diffused as its feebler congener, Polystomella striatopunctata. It 
is found in the North Atlantic, as far north as Disco Bay, Greenland ; in the Faroe 
Channel, on the coast of Great Britain, Denmark, Belgium, France, and Spain, in the 
Mediterranean and the Adriatic . amongst the West Indies and the Cape de Verde Islands, 
and southwards to the Falkland Islands. It occurs on the shores of the Indian Ocean, 
and of the Southern Ocean as far south as Kerguelen Island ; on the west coast of 
