REPORT ON THE FORAMINIFERA. 
155 
Spiroloculina grata, Terquem (PL X. figs. 16, 17, 22, 23). 
Spiroloculina grata, Terquem, 1878, Mem. Soe. g4ol. France, ser. 3, vol. i. p. 55, pi. x. figs. 14, 15. 
The figures of Spiroloculina grata in Terquem’s memoir on the Foraminifera of the 
Upper Pliocene beds of the island of Rhodes, represent with tolerable accuracy the thin 
striate Spiroloculince not uncommon in coral detritus. The surface-ornamentation of 
these specimens is often irregular and the lines more or less oblique ; and the final 
segment is generally extended so as to form a tubular neck. 
This species is common on coral-reefs, even to depths of 400 or 500 fathoms. Of 
twelve recorded localities only one is in tire western hemisphere, — off Bermuda 435 fathoms. 
It occurs in shallow-water in the Red Sea, and is abundant in a gathering of shore-sand 
from the east coast of Madagascar, the specimens being of large size ; the remaining 
localities are all in the neighbourhood of the islands of the Pacific. 
As above indicated, it was originally described from fossil specimens obtained from 
the later Tertiaries of the island of Rhodes. 
Spiroloculina antillarum, d’Orbigny (PI. X. fig. 2 i , a.b.). 
Spiroloculina antillarum, d’Orbigny, 1839, Foram. Cuba, p. 149, pi. xi. figs. 3, 4. 
Under this name d’Orbigny figures a somewhat heavy, biconvex, striate Spiroloculina, 
found by him in the shore-sands of Cuba. Whether it is worth while to separate such 
forms from the other striate varieties of the same genus may be open to question. The 
drawing on PI. X., which is taken from a Challenger specimen, pretty accurately 
represents the characters of the original figure in the !£ Cuba” monograph. 
Spiroloculina antillarum has been observed only at one Station, No. 122, iu the 
South Atlantic, off Pernambuco, 350 fathoms. 
Spiroloculina (1) convexiuscula, n. sp. (PI. X. figs. 18-20). 
Test compressed, broadly elliptical or nearly circular, slightly biconvex ; peripheral 
edge sharp or carinate ; lateral surfaces marked by partial, irregular, longitudinal 
costse. Segments few in number, broad, embracing ; septation obscure externally. 
Aperture placed somewhat at one side of the median peripheral line ; oval, bordered by 
a thickened or everted lip. Long diameter rarely more than -g^th inch (O' 5 mm.). 
It is difficult to say to which of the Milioline genera this pretty little species may with 
most propriety be assigned. At first sight it has the appearance of the young or imma- 
ture condition of some larger species, but its very constant characters and its distribution 
alike forbid this supposition. In many specimens the broad embracing chambers of the 
final convolution completely enclose all the preceding ones, a condition which suggests 
affinity with a section of the genus Biloculina, characterised by compression in a direction 
contrary to the normal or typical plan. But this is not an invariable feature, and the 
