750 LIMESTONES AND TUFFS OF MALEKULA, N H., 



often faulted across its plane of growth or attachment-surface, 

 as if the onslaught of talus-blocks had disturbed a half con- 

 solidated reef-accumulation, shattering the thin cake-like organic 

 overgrowths. The ground-mass of the rock consists of a fine, 

 crystalline, calcitic mud. Amongst the amorphous-looking 

 brecciated fragments there appear to be traces of coral structure. 



The Foraminifera seen in this limestone in the order of their 

 abundance are : — 



Polytrema planum Carter. One specimen measures about 

 10 mm. in length. (PI. xl., fig.ll). 



Amphistegina lessonii d'Orb. 



Heterostegiyia depressa d'Orb. Examples with a thick central 

 disc. 



Ca7'penteria sp. 



Rotalia sp. 



Truncatulina sp. 



% Textidaria. 



The other organic remains present in this rock are polyzoa, 

 echinoid spines and a thin, encrusting (?) calcareous alga. 



No.88. — "Limestone fiom hil] above Port Stanley, near sea- 

 level." 



General characters : a cream-coloured brecciated limestone, in 

 all probability originally entirely organic, but subsequently 

 suffering a certain amount of decomposition and disintegration, 

 resulting in its present granular structure. The chief organic 

 constituents are calcareous algae, represented by the branching 

 Lithothamnium, L. ramosissi7num, and molluscan shells, chietly 

 gasteropods, and a plate of an echinid test. 



The only Foraminifera noticed are : — 



Miliolina hosciana d'Orb. sp. 



1. Verneuiluia pygmcea Egger. 



1 Carpenteria. 



Gypsina 1 globulus Reuss sp. 



AmphistegUia lessonii d'Orb. 



C?) Pliocene or subrecent in age. 



