238 Christmas Island. 



Planorlulina mediterranensis, d'Orb. 



Planorbulina larvata, P. & J. 



(Both the above forms of Planorlulina are intergrown in this 

 specimen with a massive Lithoth amnion.) 



Carpenteria lithotlmmnica ?, TJhlig. Frequent. 



Rtipertia, sp. Basal segments adherent to a floor consisting of 

 Lithothamnion, which coats the surface of the basalt. 



Rotalia papulosa, var. compressitiscula, Brady. Yery common. 



Gypsina glohulus (Reuss). Occasional. 



Ampin at erjina lessonii, d'Orbigny, Frequent. 



Heterostegina depressa, d'Orbigny. Several fragments. 



Towards the side of the Cove whence the succession of rock 

 specimens now being described were taken, two specimens were 

 .(■ollected on either side of a basaltic mass, numbered 229 and 

 220 respectively. 



Taking the specimen Xo. 229 first, it is seen to have many 

 points in common with the specimen No. 571 noticed above, 

 and although it differs from that rock in some slight degree of 

 minute structure, yet they contain so much in common and are in 

 themselves different from those rocks immediately below and above 

 that they are presumably different parts of the same bed, 



No. 229 is a very hard, pale cream-coloured or whitish limestone. 

 Thin sections of the rock show it to be composed of Litliotliamnion 

 in some quantity of the laminar and investing type, many fora- 

 minifcra (but no Orlitoides present), echinoderm plates, and polyzoa. 



The foi^aminifera in No. 229 are as follows : — 



Textidaria riigosa (Reuss). 

 Several typical specimens are seen in this section. 



Planorhidina acervalis'^, Brady. 



The specimens referred doubtfully to the above species are 

 adherent and forming a depressed layer, with thin- walled chambers. 

 They are fairly common in the section. 



Carpenteria, sp. near C. monticularis, Carter. 



Mostly fragmentary, but there is one example with a perfectly 

 enclosed chamber - ca\'ity. The separate pieces of the test are 

 numerous in this section. 



Pulvimdina repanda (Fichtel & Moll). 

 One good specimen was noticed in the slide of No. 229. 



