FORAMINIFERA OF THE FUNAFUTI ATOLL. 411 
The inequilateral modifications of Spirilline are not unfrequent 
at Funafuti, and are of much interest since they point to the 
rotaline affinities which the genus has towards shells of the 
trochoid type. The smooth, more or less tumid surface may be 
regarded as the superior, and the ornate surface as the inferior 
face. 
Off Tutanga, 200 fathoms ; very rare. 
CYMBALOPORA (TRETOMPHALUS) INVERSA, sp. nov. (PI. 36. 
figs. 18 a-c.) 
Test with the earlier chambers arranged as in Cymbalopora, 
followed by an inflated subspherical series enveloping one face 
of the earlier segments. In this species the secondary inflated 
portion covers over the superior primordial face of the shell, 
whereas in C. (7.) bulloides the reverse is the case*. The 
inflated shell has the surface often coarsely perforate as in 
C. (T.) bulloides, but not invariably so. 
A section passing through the test in a median direction (that 
is to say, vertically through the spire) proves this species to be a 
remarkable case in which the sarcode and accompanying test have 
been drawn back, so to speak, over the earlier part of the shell. 
The inflated shell, agreeing with the ‘“brood-chamber” in 
O. bullocdes, is in our Funafuti specimens almost invariably filled 
with an (?) aragonitic deposit showing a distinctly radial and 
concentric structure. The external coloration of the inflated 
part of the shell is milky-white. 
Width of test 45 mm. 
W. of Tutanga, 35 fathoms, common; off Funamanu, 50 
fathoms, very rare; off Tutanga, 200 fathoms, frequent. 
PULVINULINA PUNCTULATA (d’Orbigny), var. SCABRA, nov. 
(PL. 36. fig. 19.) 
The present variety differs from the type essentially in the 
coarse scabrous surface of the test, evidently the result of a 
secondary thickening of the shell round the exterior of the 
perforations or- tubules of the ordinary shell-wall. Greatest 
diameter of test 2°4 mm. 
Off Tutanga, 200 fathoms; rare. 
* Rosalina bulloides, d’Orbigny, 1839, Foram. Cuba, p- 104, pl. iii. figs. 2-5. 
Cymbalopora (Tretomphalus) bulloides (d’Orb.), Brady, 1884, Rep. Chall. 
vol. ix. p. 688, pl. cii. figs. 7-12. 
