10 MR. F. CHAPMAN ON FORAMINIFERA 
a more decidedly triangular and elongate test, and the oral end 
less inflated. The valve is more usually tooth-like, rather than a 
simple flap as in d’Orbigny’s specimens. 
The elongated examples of V. Davidiana, which by the way 
are rare, may be compared with V. Oviedoiana of d’Orbigny * ; 
the latter, however, differs in the marked concavity of the face of 
each segment, as seen in the figures of d’Orbigny’s Cuban 
specimens. 
V. Davidiana is by no means common, being represented in all 
the samples mentioned below by one or two examples at most. 
It was found in the sand of the beach at Avalau Id. (South Id.) 
and at Fualopa Id. (Gold Id.) ; in the sand pumped up from 
the 1st boring (Sollas) “at no great depth”; and it also 
occurred in the lagoon boring at 213 feet below the lagoon- 
floor. 
Family ROTALITD A. 
Subfamily SPIRILLINING. 
Sprriniina, Hhrenberg [1841]. 
SPIRTLLINA SPINIGERA, sp.nov. (Pl. 1. figs. 7 a-c.) 
Test free, but perhaps at one time adherent or resting generally 
on one face, discoidal, consisting of a single tube in four con- 
volutions. The two sides unequal, the broader or basal face 
concave, having the primordial or central portion globulose and 
armed with a short blunt spine which does not project beyond 
the general surface; around the peripbery other blunt spies 
are arranged, to the number of fourteen or more, and the salient 
edges of the coils are more or less spinose. The upper (smaller) 
face is slightly convex and tolerably smooth. The terminal 
portion of the coil is separated from the rest of the shell and is 
slightly reverted. Diameter of test 7; inch (325 mm.). 
In having the lateral faces of unequal size this form resembles 
Spirillina inequalis, Brady v. 
It also shows some affinity towards S. tuberculata, Brady {, in 
its separated termination. 
The form may have been derived directly from S. lémbata var. 
* Foram. Cuba, 1839, p. 103, pl. ii. figs. 21, 22 (V. Ovtedoana on plate). 
+ Quart. Journ. Mier. Sci. vol. xix. n. s. (1879), p. 278, pl. viii. figs. 25 a, b. 
t Ibid. p. 279, pl. viii. figs. 28a, >. 
