474 
THE VOYAGE OF H.M.S. CHALLENGED. 
Lagena acuta, Reuss, sp. (Pl. LIX. fig. 6, a.b.V). 
Fissurina acuta, Reuss, 1858, Zeitsdhr. d. deutsch. geol. Gesellsch., vol. x. p.434. 
„ „ Id. 1863, Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi. p. 340, pl. vii. 
figs. 90, 91. 
Lagena vulgaris, var. fissurina (pars), Ry. Jones, 1872, Trans. Linn. Soc. Lond., vol. xxx. p. 51, 
pl. xxix. fig. 6. 
Lagena acuta bears much the same relation to Lagena Icevigata that Lagena 
apiculata bears to Lagena globosa; in other words, it is the subvarietal modification 
in which the base is drawn out to a point instead of being rounded. The shell figured 
on Pl. LIX. is not quite typical and might with equal propriety be treated as a mucronate 
example of Lagena marginata. 
The distribution of Lagena acuta, whether living or fossil, is probably coextensive 
with that of Lagena Icevigata. 
Lagena staphyllearia, Sch wager, sp. (Pl. LIX. figs. 8-11). 
Fissurina staphyllearia, Scliwager, 1866, Novara-Exped., geol. Theil, vol. ii. p. 209, pL v. fig. 24. 
Lagena vulgaris, var. spinicosto-marginata, Ry. Jones, 1872, Trans. Linn. Soc. Lond., vol. xxx. 
p. 57, pl. xix. figs. 34-36. 
The compressed Lagence with symmetrically arranged basal spines may be assigned to 
Lagena staphyllearia. The pointed processes of recent specimens are usually placed at 
regular intervals on the median line, as shown in figs. 8-10. Occasionally a deviation 
from the typical condition is encountered in the form of double spines, of which fig. 1 1 is 
an example. 
In the North and South Atlantic Lagena staphyllearia has only been observed 
at great depths, namely at four Stations, ranging from 2200 to 2750 fathoms ; but in the 
Southern Ocean and the South Pacific it occurs also from time to time in shallow water 
near the coast-line. 
The fossil shell figured by Schwager was from the Upper Pliocene deposit of Kar 
Nicobar. 
Lagena unguiculata, H. B. Brady (Pl. LIX. fig. 12). 
Lagena unguiculata, Brady, 1881, Quart. Journ. Micr. Sci., vol. xxi., N. S., p. 61. 
Test pyriform, compressed ; inferior end broad and tapering to a thin edge, which is 
furnished with a number of more or less curved teeth symmetrically set. 
A rare variety, differing but little from Lagena staphyllearia. It occurs in the South 
Atlantic, at Station 332, depth 2200 fathoms. 
