FROM THE FUNAFUTI ATOLL. ial 
denticulata, Brady *, by the redundant outgrowth of the transverse 
bars or denticule, but this is merely a suggestion. 
From beach-sand, Avalau Id. (South Island), Funafuti; very 
rare. Collected by Prof. Sollas. 
Also from the boring in the lagoon at Funafuti at 62 feet 
below the floor of the lagoon (163 feet below low-water spring 
tides) ; very rare. 
SPIRILLINA TUBERCULATO-LIMBATA, Sp. nov. (PI. 1. figs. 8 a-c.) 
Test discoidal, consisting of a single tube with about six 
conyolutions. The larger and flat surface is limbate and has the 
peripheral edge of the coil sharp on that side; the smaller face 
is slightly rounded and strongly tuberculate. The upper part 
of the peripheral edge rounded. Diameter = inch (‘5 mm.). 
The dissimilar faces remind one of S. énequalis, Brady, but 
in that species the peripheral edge is blunt or square and the 
smaller face is not so characteristically tuberculate. 
S. twberculato-limbata, as its name implies, combines in one 
form the characters of two of Brady’s species, S. tuberculata + 
and 8. limbata ¢. 
This species was found at the depth of 40 feet in the 2nd 
boring at Funafuti (Sollas Coll. 1896), where it was common. 
It has occurred sparingly at the depths of 65 and 70 feet 
in the deep boring at Funafuti (David Coll. 1897). Also in 
dredgings N. of Pava, 36 fathoms (David Coll. 1898). 
Subfamily Roraniin 2. 
Discorzsina, Parker &§ Jones {1862 |. 
DiscoRBINA TUBEROCAPITATA, sp.nov. (Pl. 1. figs. 9 ace.) 
The superior aspect roughly conical, the apex swollen into a 
ball-like prominence ; two convolutions of the shell are visible 
on the apex. The inferior surface is flat or slightly concave, and 
exhibits five chambers ; in the area round the umbilical depression 
the surface of the shell is granulate. The peripheral edge has a 
thin and narrow flange. Shell translucent and of a pale opales- 
cent blue colour. Diameter “5 inch (°347 mm.). 
* Rep. Chall. vol. ix. 1884, p. 632, pl. Ixxxv. fig. 17. 
+ Quart. Journ. Mier. Sci. vol. xix. n. s. 1879, p. 279, pl. viii. ,figs. 28a, 0: 
Rep. Chall. vol. ix. 1884, p. 631, pl. Ixxxv. figs. 12-16. 
t Quart. Journ. Micr. Sci. vol. xix. n. s. 1879, p. 278, pl. viii. figs. 26a, ); 
Rep. Chall. vol. ix. 1884, p. 632, pl. Ixxxv. figs. 18-21. 
