542 
THE VOYAGE OF H.M.S. CHALLENGER 
which, at first sight appear very dissimilar — Cristellarict variabilis and Cristellaria 
peregrina. 
Though it has not previously been recorded as a recent species, Cristellaria variabilis 
is by no means uncommon at depths ranging from 100 to 600 fathoms. It occurs at 
ten Stations in the North Atlantic, 50 fathoms to 1630 fathoms ; at three in the South 
Atlantic, 350 fathoms to 675 fathoms; at seven in the South Pacific, 155 fathoms to 
580 fathoms ; and at one in the North Pacific, 345 fathoms. 
Reuss’s specimens were Miocene fossils from Baden, near Vienna, and from Felso- 
Lapugy, in Transylvania ; and those figured by Schwager were from the Upper Tertiary 
clay of Kar Nicobar. 
Cristellaria crepidula, Fichtel and Moll, sp. (PL LXVII. figs. 17, 19, 20 ; PI. LXVIII. 
figs. 1, 2). 
Nautilus crepidula, Fichtel and Moll, 1803, Test. Micr., p. 107, pL xix. figs. g-i. 
Cristellaria crepidula, d’Orbigny, 1839, Foram. Cuba, p. 64, pi. viii. figs. 17, 18. 
„ bertlielotiana, Id. 1839, Foram. Canaries, p. 125, pi. i. figs. 14, 15. 
„ intermedia, Reuss, 1845, Verstein. Bohm. Kreid., pt. i. pp. 33, 108, pi. xiii. 
figs. 57, 58; — pt. ii. , pi. xxiv. figs. 50, 51. 
„ cymboides, d’OrbigDy, 1846, For. Foss. Vien., p. 85, pi. iii. figs. 30, 3-1. 
„ intermedia, Alth., 1850, Haidinger’s Naturw. Abhandl., vol. iii. p. 267, pi. xiii. 
fig. 23. 
„ jugleri, Reuss, 1851, Zeitschr. d. deutsch. geol. Gesellsch., vol. iii. p. 89, pL iv. 
fig. 19, a.b. 
„ subarcuatula, 'Williamson, 1858, Rec. For. Gt. Br., p. 29, pi. ii. figs. 56, 57. 
„ grata, Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi p. 70, pi. vii. 
fig. 14. 
„ planiuscula, Id. Ibid. p. 71, pi. vii. fig. 15. 
„ cordiformis, Terquem, 1863, Foram. du Lias, 3 i4me mem. p. 203, pi. ix. fig. 14, 
a.b. 
• „ acuminata, Id. Ibid. p. 210, pi. x. fig. 5, a.b. 
Hemirobulina compressa, Stache, 1864, Novara-Exped., geol. Theil, vol. i., Palaont., p. 229, 
pi. xxiii. fig. 8, a.b. 
Cristellaria crepidida, Parker and Jones, 1865, Phil. Trans., vol. civ. p. 344, pi. xiii. figs. 15, 16 ; 
pi. xvi. fig. 4. 
,, kochi, Reuss, 1866, Denkschr. d. k. Akad. Wiss. Wien, vol. xxv. p. 139, pi ii. 
fig. 35, a.b. 
„ galeata, Id. Ibid. p. 141, pi. iii. fig. 8, a.b. 
Fichtel and Moll’s figures of Nautilus crepidula embody the typical characters of 
a large group of the weaker varieties of Cristellaria distinguished by their compressed 
form, elongate-oval outline, and long oblique segments. The term may properly be 
confined to forms which have a thin, rounded, non-carinate periphery, and smooth 
exterior. 
