Foraminiferal Limestones. 255 



This variety differs from tlie specific form in being altogether 

 stouter, and more compressed in internal structure with regard 

 to the peripheral chamberlets. It also differs essentially in being 

 strongly undulated along the median plane, and sometimes in being 

 unequally developed and much thicker on one side of the median 

 layer. The undulated contour reminds one of 0. (Z.) ephippioideSj 

 but it is much thicker in the central disc than that species. Average 

 diameter f inch (16*8 mm.). 



Orlitoides (Z.) andrewsiana, sp. nov. Frequent. 



No. 955. '' Great block beneath High Cliff, ^rth-East Point." 

 An Orbitoidal limestone breccia, cemented by recent reef material, 

 with the fragments overgrown with enormous encrusting Poly- 

 tremata. This Polytrema is of great interest. It has also been 

 met with by one of us in the recent reef rocks of the Funafuti 

 Atoll, where it constitutes a large proportion of some of the 

 limestones, and often found intergrown with LitJiothamnion. 



Foraminifera : 

 Glohigerina hulloides, d'Orbigny. Rare. 

 Cymbalopora poeyi^ d'Orb. Rare. 



Polytrema miniaceum (Pallas), var. nov. involva, Chapman. 

 Amphistegina lessonii, d'Orbigny. Common. 

 Orhitoides {Lepidocydina) verheehi^ JS'ewton & Holland. Rare. 

 ,, ,, ephippioides, sp. nov. One specimen. 



Nos. 827 and 581. "From low cliff of limestone resting on 

 basalt, at head of valley, 500 feet, two miles south of Flying Fish 

 Cove.'' 



A limestone chiefly composed of Orhitoides. The material of the 

 rock is well crystallized, and was originally deposited concentrically 

 around the larger organisms. 



Foraminifera : 



Miliolina, sp. near M. circularis (Born.). 



Alveolina melo (F. & M.). One specimen. 



Truneatulina, sp. (thin- shelled), cf. T. lolatula (W. & J.) or 

 T. ungeriana (d'Orb.). Frequent. 



Carpenteria monticularis, Carter. Frequent. 



Carpenteria utricularis, Carter. Rare. 



Rotalia schroeteriana^ P. & J. Common. 



Amphistegina lessonii, d'Orb. Common. 



Heterostegina depressa, d'Orb. Rare. 



Orhitoides {Lepidoeyclina) andrewsiana, sp. nov. (PL XXI, 

 Fig. 14.) 



