244 Christmas Island. 



Miliolina alveoliniformis, Brady. 



M. alveoliniformis, Bradv, 1879, Quart. Joum. Micr. Sci., vol. xix, n.s., p. 54 ; 

 idem, 1884, Eep. ChalL, vol. ix, p. 181, pi. viii, figs. 15-20. 



The specimen in our slides referred to the above species presents 

 all the characters of the typical 2f. alveolinifortnis in transverse 

 section. It is interesting to note this occurrence of M. alveo- 

 liniformis in the Tertiary rocks for the first time as a fossil. It is 

 a "wellknovm form in coral sands, to which deposits it seems 

 restricted. 



Textiilaria rugosa (Reuss). 



A few specimens of the above are seen in section N'o. 562, 



Flafiorbulina mediterranensis ?, d'Orbigny. 



To this species we may with some reservation ascribe the neat 

 adherent forms of Platiorbulince seen in sections of No. 562. 



Carpenteria, sp. 



Numerous fragments of a Carpenteria occur in these sections 

 (562). Since they have invariably been broken down into quite 

 small pieces, it is not possible to say anything with regard to their 

 specific relationship, excepting that they generally resemble the test 

 of Carpenteria monticularis, Carter. 



Amphistegina lessonii, d'Orbigny. 

 This is common in the limestone now being described. 



Seterostegina depressa, d'Orbigny. 

 This species is frequent in No. 562. 



Orlitoides {Lepidocyclina) sumatrensis, Brady. (PI. XX, Fig. 6.) 



Orbitoides sumatrensis, Brady, 1875, Geol. Mag., dec. ii, vol. ii, p. 536, pi. xiv, 

 fig. 3; also Jaarb. Mijn. Ned. Ooste-Indie, 1878, vol. vii, pt. 2, 

 p. 165, pi. ii, fig. 3. 



Orbitoides [Lepidoeyclina) sumatrensis, Brady: Newton & Holland, 1899, Ann. 

 Mag. Nat. Hist., ser. vii, vol. iii, p. 259, pi. s, figs. 7-12. 



This species was first described from the west coast of Sumatra, 

 and Messrs. Nevrton &, Holland have lately recorded the same form 

 from the Miocene Limestone of Borneo. 



The species resolves itself into two typical forms, one slightly 

 different from the other in external shape and distinguished by 

 the primordial chamber being megalospheric or microspheric 

 respectively. In this rock 0. sumatrensis is associated with 



