These comprise six specimens of
Cristellaria
and one
Lituola
. The latter may be regarded as
L. nautiloidea
, var., and is small, discoidal, depressed (slightly biconcave), with blunt or rounded edge. It belongs to the
Haplophragmium
division, is much like the recent
H. emaciatum
, H. B. Brady, ‘Report on the Foraminifera obtained during the Voyage of the “Challenger,” p. 305, pl. 33. f. 27, and is not far removed from
H. nanum
, H. B. B., and
H. acutidorsatum
, Hantken; but the last is involute, instead of evolute, in its growth.
The specimen before us may be termed
Lituola nautiloidea
Lam., var. (
Haplophragmium
)
depressa
, nov., or, for convenience,
L. depressa
. It looks so smooth and worn that it is possibly a
derived fossil
. Pl. XXXIV. fig. 2.
Of the
Cristellarice
, which are all of small size, and some minute, there are the following species or varieties:—
(1)
Cristellaria rotulata
(Lamarck), thin-edged, with convex umbilicus, and raised septal lines; the chambers are rather small, very oblique and subfalcate, about nine in the last whorl (Pl. XXXIV. fig. 9). There is also a very small, ill-grown
C. rotulata
, with the posterior angle of some of the chambers projecting from the circular edge; not an uncommon condition.
(2)
Cristellaria cultrata
(Montfort), with keel, central boss, thick and raised septa, and about 7 chambers in the last whorl, Pl. XXXIV. fig. 11.
(3)
A less circular (more elliptical) variety of the last-mentioned form, with 6 chambers visible, the last of
