502 
THE VOYAGE OF H.M.S. CHALLENGER. 
Nodosaria consobrina, var. emaciata, Reuss (PL LXII. figs. 25, 26). 
Dentalina emaciata, Reuss, 1851, Zeitsclir. d. deutsch. geol. Gesellsch., vol. iii. p. 63, pi. iii. fig. 9. 
„ preelonga, Costa, 1856, Atti dell’ Accad. Pout., vol. vii. p. 163, pi. xii. fig. 21. 
Nodosaria ( D .) consobrina, var. emaciata, Reuss, 1865, Denksclir. d. k. Akad. Wiss. Wien, 
vol. xxv. p. 132, pi. ii. figs. 12, 13. 
Reuss’s later drawings of this variety accord precisely with the recent specimens 
figured in PI. LXII. The shell differs from that of the type chiefly in its greater length, 
the larger number of its segments, and their relatively shorter contour. 
Nodosaria consobrina, whether of the typical form or the “emaciate” variety, is found 
living in the North Atlantic at depths ranging from 290 to 725 fathoms ; in the South 
Atlantic at 350 fathoms; off the Cape of Good Hope, 150 fathoms; and in the South Pacific, 
from 129 to 1375 fathoms. There is no record of its occurrence in the North Pacific. 
Fossil specimens have been procured from the following amongst other geological 
formations : — the Chalk of Ireland (Wright) ; the London Clay (Jones and Parker) ; the 
Septaria-clays of Germany (Reuss, Bornemann, &c.); the Clavulina-szaboi beds of Hungary 
(Hantken) ; the Miocene of various parts of Austria (d’Orbigny, Neugeboren, Karrer, &c.) ; 
the later Tertiaries of Italy (Costa) ; and the Post-tertiary beds of Norway (Crosskey and 
Robertson), of Scotland (Robertson), and of the Island of Ischia (Vanden Broeck). 
Nodosaria (D.) plebeia, Reuss (PI. LXIII. fig. 2). 
Dentalina plebeia, Reuss, 1855, Zeitsclir. d. deutsch. geol. Gesellsch., vol. vii. p. 267, pi. viii. 
fig. 9. 
„ megalopolitana, Id. Ibid. p. 267, pi. viii. fig. 10. 
,, tenuicollis, (?) Id. Ibid. p. 267, pi. viii. fig. 11. 
Dentalina cequalis, Karrer, 1864, Novara-Exped. geol. Tbeil, vol. i., Palaont., p. 74, pL xvi. 
fig. 1. 
Nodosaria vermiculum, Reuss, 1866, Denkschr. d. k. Akad. Wiss. Wien, vol. xxv. p. 133, pi. ii. 
figs. 14, 15. 
„ approximata, Id. Ibid. p. 134, pi. ii. fig. 22. 
Dentalina plebeia, Brady, 1867, Proc. Somerset. Arch, and Nat. Hist. Soc., vol. xiii. p. 108, 
pi. i. fig. 15. 
Nodosaria vermiculum, Reuss, 1870, Sitzungsb. d. k. Ak. Wiss. Wien, vol. lxii. p. 474, No. 22; — 
Schlicht, 1870, Foram. Pietzpuhl, pi. viii, figs. 18; pi. x. figs. 5-9, 11. 
This species was founded by Reuss on specimens obtained from the Chalk of Mecklen- 
burg. The test 'is cylindrical and somewhat curved, tapering and more or less pointed at 
the extremities ; the segments are numerous and the septal lines transverse and straight ; 
the outline of the shell is even and exhibits no sutural constrictions, the septa being 
marked externally by lines only. 
Dentalina megalopolitana has the same morphological characters as Dentalina plebeia, 
but is more stoutly built ; and Dentalina tenuicollis is likewise similar, but has an 
