■238 Christmas Island. 



Planorhtdina mediterranensis, d'Orb. 



Planorhulina larvata, P. & J. 



(Both the above forms of Planorhulina are intorgro^vn in this 

 specimen with a massive Lithothamnion.) 



Carpcntcria lithothamnica ?, TJhlig. Fi'equent. 



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

 Lithothamnion, which coats the surface of the basalt. 



Rotalia papulosa, var. compressiuscida, Brady. Very common. 



Gypsina glohdus (Eeuss). Occasional. 



Amphiiifciiina lessonii, d'Orbigny. Frequent. 



Jleteroslegina 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 

 collected 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. 671 noticed above, 

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

 minxitc structure, yet thcA' 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. 



1^0. 229 is a very hard, pale cream-coloured or whitish limestone. 

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

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

 minifera (but no Orhitoides present), echinoderm plates, and polyzoa. 



The foraminifera in No. 229 are as follows : — 



Textularia rngosa (Eeuss). 

 Several typical specimens are seen in this section. 



Planorhtdina 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 - cavity. The separate pieces of the test are 

 numerous in this section. 



Pulvinulina repanda (Fichtel & Moll). 

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



