508 



H. B. GUPPY ON THE RECENT 



Residue (66 -86), of a dark green colour, consists of: — 



(a) Minerals (40 - 00) m. di. 0'3, some fragments TO to 2-0 mm.; mica, 



quartz, felspar, hornblende, magnetite, augite ; many glassy frag- 

 ments. A few beautifully formed quartz crystals were found in 

 this rock. 



(b) Siliceous Organisms. — None noticed. 



(e) Fine Washings (26-86). — Green organic-like substance with argillaceous 

 matter and fine mineral and glassy fragments. 



Many glauconitic-like casts of most of the organisms mentioned above were 

 also obtained in this rock. 



List of Foraminifera. 



Biloculina ringens (rare). 

 Miliolina seminuluru (several). 

 Reophax pilulifera (few). 

 Textularia sagittula (rare). 

 Bulimina marginata (rare). 

 Nodosaria soluta (several). 



,, raphanus (rare). 

 Rhabdogonium tricarinatum (rare). 

 Virgulina suLsquamosa (few). 

 Uvigerina tenuistriata (many). 

 Sagrina virgula (common). 



„ columellaris (common). 



,, striata (few). 

 Frondicularia alata (rare). 

 Cristellaria cultrata (few). 



,, papillosa (few). 



,, calcar (few). 



,, aculeata (few). 



,, articulata (few). 



Cristellaria compressa (rare). 



„ dentata (rare). 



,, italica (few). 

 Globigerina bulloides (common). 



,, ,, var. triloba (common). 



„ sacculifera (common). 



„ dubia (many). 



„ fequilateralis (few). 



„ Orbulina (universa) (many). 



Sphseroidina deliiscens (many). 

 Pullenia obliquiloculata (rare). 

 Cymbalopora poeyi ? (few). 

 Tnmcatulina lobatula (rare). 



,, rostrata (many). 



,, prajcincta (many). 



Bamnlina globulifera (rare). 

 Pulvinulina menardii (common). 



,, ,, var. tumida (common). 



„ elegans (few). 



The chalky coral limestone, before referred to as forming the sides of a 

 gorge in the higher part of one of the streams, presents most of the characters 

 of true chalk. It was exposed in faces 20 feet in thickness ; but I was 

 unable to ascertain its position relative to the soft Foraminiferous deposit 

 exposed in the sides of the stream lower down. However, a similar chalk-like 

 limestone in the Shortland Islands overlies the softer dej)osit, as noticed in the 

 description of those islands. 



Mr Murray describes the characters of specimens of this interesting rock 

 which I sent to him, as follows :— 



A friable chalky coral limestone rock, of a light creamy colour, showing 

 no definite structure. 



Carbonate of Calcium (94-19 per cent.) consists of Lamellibranchiate shells, 



