294 F, CHAPMAN. 
The lengths of the chamberlets near the centre of the disc 
in C. communis, as given by Martin, measure 75 mm., whilst 
that of C. pustulosus is much smaller, being only about 2; 
mm. Inthe present example the chamberlets of about the 
third annulus from the primordial chambers have a mean 
length of 7z mm., so that the evidence in this respect is in 
favour of a reference to the above species, C. communis. 
~ Genus LHPIDOCYCLINA, Gumbel. 
LEPIDOCYCLINA SUMATRENSIS, Brady sp. Plate VII, fig. 3. 
Orbitoides sumatrensis, Brady, 1875, Geol. Mag., Dec. 11, 
Vol. a1, p. 550, DlAxiv, lige: | 
Orbitoides (Lepidocyclina) sumatrensis, Brady, Newton 
and Holland, 1899, Ann. Mag. Nat. Hist., Ser. 7, Vol. 
Ill, p. 259, pl. x, figs. 7, 8, 10, 11 (fig. 12=L. tournoueri, — 
Lem. and Douv.). Jones and Chapman, 1900, Mon. 
Christmas Island (Brit. Mus.), p. 244, pl. xx, fig. 6. 
Lepidocyclina sumatrensis, Brady sp., Silvestri, A., 1906, 
Atti della Pontificia Accad. Rom. d. Nuovi Lincei, 
Anno LIx, p. 150. 
Some typical and beautifully preserved specimens of L. 
sumatrensis occur in the limestone sections. They are of 
average dimensions, having a diameter of about 3mm. The 
Borneo specimens also have a diameter of 3 mm., whilst 
those from the Loo Choo Islands are only 1°5 mm. 
Lemoine and Douvillé have recorded L. cf. sumatrensis 
from France and Spain,’ but that particular form is herein 
referred to L. Andrewsiana, Jones and Chapman for reasons 
subsequently mentioned. LL. sumatrensis has been cited, 
with some reservation by the present writer, from the New 
Hebrides Miocene.” Other localities for this species are, 
1 Mem. Soc. Geol. France, Vol. x11, pt. 11, 1904, p. 18, pl. i, fig. 14; pl. 
li, fig. 15; pl. iii, fig. 6. 
$ Chapman, Journ. Linn. Soc. N. S. Wales, Vol. xxx, 1905, p. 267, and 
ibid., Vol. xxx11, pt. 4, 1908, p. 753. 
