264 FORAMINIFERAL ROCKS ON WEST COAST OF SANTO, 



very well preserved, the interspaces being filled in with calcareous 

 mud, and often further cemented by crystalline calcite. The 

 Foraminifera are as follows : — 



Miliolina sp. 



Carpenteria sp. (somewhat crushed); common. 



Polytrema plamim, Carter (encrusting masses of Lithothamnion). 



Amphisteghia lessoni, d'Orb.; frequent. 



Heterostegina cf. margaritata, Schlumb. ; frequent. 



Cycloclypeus sp. (fragmentary); fairly common. 



Lepidocyclwa martini., Schlumb. 



178. — "Shaley beds from Wai Malikoliko, same locality as 176, 

 Santo." 



A detrital limestone with variable structure. The rock-section 

 shows several layers bedded upon one another. The coarser 

 portion of the rock is a fragmental organic limestone containing 

 a few (?) andesitic particles. The only organic remains which 

 can be recognised in this portion of the rock are, besides fora- 

 miniferal tests, Lithotlt amnion (branching form) and a few shell- 

 fragments. The Foraminifera in this coarser portion are : — 



Bolivina cf. textilarioides, Reuss. 



Glohigerina cf. bidloides, or G. 7'osacea, d'Orb.; numerous. 



1 Carpenieria (fragments). 



Le2ndocycli7ia sp. 



The finer layers in this slide consist of an impure calcareous 

 mud, with well-marked lines of sedimentation. There are 

 numerous transparent particles, evidently organic, but too frag- 

 mentary to be recognisable, with the exception of an occasional 

 test of Glohigerina. 



182. — "Decomposed friable rock just below the limestone at 

 Wai Malikoliko." 



This is an ochreous-coloured tuff containing numerous Fora- 

 minifera, chiefly of the genus Lepidocydina. An Ostracod 

 [Bairdia) and a fragment of an echinoid spine were also seen. 

 The Foraminifera are more or less corroded, and only the larger 

 forms, as a rule, seem to be left. The Foraminifera obtained 



