DESCRIPTION OF A LIMESTONE OF LOWER MIOCENE AGE. 295 
Borneo, Sumatra, Christmas Island and the Loo Choo 
Islands, Japan. 
LEPIDOCYCLINA ANDREWSIANA, Jones and Chapman sp. 
Plate IX, fig. 8. 
Orbitoides (Lepidocyclina) Andrewsiana, Jones and Chap- 
man, 1900, Mon. Christmas Island (Brit. Mus.), p. 255, 
pl. xxi,. fie. 14. 
Lepidocyclina sumatrensis, Newton and Holland (non 
Brady), 1902, Journ. Coll. Sci. Imp. Univ., Tokyo, Vol. 
eee Aet Gop. 11. pl. i, fig..7. 
L. cf. sumatrensis, Brady, Lemoine and Douvillé, R., 1904, 
Mem Soe. Geol. France, Vol. xl, pt. ii, p. 18, pl. i, fig. 
14; pl. ii, fig. 15; pl. iii, fig. 6. 
L. Andrewsiana, J. and C., Chapman, 1908, Journ. Linn. 
Soc. N.S. Wales, Vol. Xxxtl, p. 757, pl. xxxix, fig. 10. 
This species is distinguished from L. sumatrensis, Brady 
sp., by its lenticular rather than subglobular shape, the 
circumferential disc as a rule being pronounced. Itisa 
larger species than L. sumatrensis, averaging about six 
milimetres in diameter. The megalospheric condition seems 
to obtain in all the specimens examined or described. 
Lemoine and Douvillé figure interesting examples from 
Spain, France and Italy under the name of L. cf. suma- 
trensis, Brady, but marked differences from that species 
are evident in the more numerously pustulate central area 
of the disc, and the tendency to develop a depressed border. 
These differences have already been noticed by Dr. A. 
Silvestri,! who refers to this form under a separate heading 
from the species identified with Brady’s true L. swmatrensis. 
From L. tournoueri, L. Andrewsiana is chiefly distinguish- 
able by the compact structure of the latter as regards the 
peripheral layers. The examples from the Loo Choo Islands 
* Atti della Pontificia Accad. Rom. d. Nuovi Lincei, Anno t1x, p. 150. 
