504 
THE VOYAGE OF H.M.S. CHALLENGER. 
to 900 fathoms, and has been found as low as 1360 fathoms. In the South Atlantic its 
range, so far as has been ascertained, is from 350 to 675 fathoms; whilst in the South 
Pacific it affects shallower water, namely, from 125 to 410 fathoms, though in one 
locality it occurs at 1350 fathoms. 
The geological distribution of the species extends from the Cretaceous period forward 
to the present time. 
Nodosaria (?) abyssorum, H. B. Brady (PI. LXIII. figs. 8, 9). 
Nodosana abyssorum, Brady, 1881, Quart. Journ. Micr. Sci., vol. xxi., N. S., p. 63. 
Test straight or only slightly curved, moniliform, often irregularly built ; walls thick 
and opaque ; segments five to nine in number, subglobose, somewhat uneven both as to 
shape and size ; primordial chamber, which is usually the largest, armed with a number of 
short, stout, terminal spines ; aperture situated in a short, wide neck, with large phialine 
lip. Length, -|th inch (3‘15 mm.), or more. 
Little need be added to the foregoing description of this species. It is not by any 
means certain that it really belongs to the genus Nodosaria, that it is not rather a 
deep-sea variety of Sagrina, allied to the monomorphous forms of Sagrina virgula 
(PI. LXXYI. figs. 8-10) ; but in the absence of intermediate specimens or other collateral 
evidence the Nodosarian contour of the shell must be allowed to dictate its generic position. 
Nodosaria (?) abyssorum has only been found in one locality : — Station 296, South 
Pacific, south-west of Juan Fernandez, depth 1825 fathoms. The specimens are tolerably 
numerous, and some of them are longer and possess a greater number of segments than 
those from which the figures are taken. 
Nodosaria ( D .) communis, d’Orbigny (PI. LXII. figs. 19-22). 
Nodosaria ( Dentalina ) communis (1), d’Orbigny, 1826, Ann. Sci. Nat., vol. vii. p. 254, No. 35. 
Dentalina communis, Id. 1840, Mem. Soc. g6ol. France, vol. iv. p. 13, 
pi. i. fig. 4. 
Nodosana communis, Reuss, 1845, Verstein. Bobm. Kreid., pt. i., p. 28, pi. xii. fig. 21. 
. „ legumen Id. Ibid. p. 28, pi. xiii figs. 23, 24. 
Dentalina inornata, d’Orbigny, 1846, For. Foss. Vien., p. 44, pi. i. figs. 50-51. 
„ badenensis, Id. Ibid. p. 44, figs. 48, 49. 
„ ferstliana, Czjzek, 1847, Haidinger’s Naturw. Abhandl., vol. ii. p. 140, pi. xii. 
figs. 10-13. 
„ haiteri, Neugeboren, 1856, Denksclir. d. k. Akad. Wiss. Wien, vol. xii. p. 81, pi. ii. 
fig. 12. 
„ orbignyana, Id. Ibid. pi. iii. figs. 1-3. 
,, subarcuata, Williamson, 1858, Rec. For. Gt. Br., p. IS, pi. ii. figs. 40, 41. 
„ torta , Terquem, 1858, Foram. du Lias, l is " mem., p. 599, pi. ii. fig. 6. 
