246 Christmas Island. 



Carpenteria capitata, sp. nov. (PI. XX, Fig. 7.) 



Test normally adherent, of a somewhat erect habit of growth. 

 The earliest - formed chambers are narrow and somewhat like 

 those of the conical-shaped CarpentericB, and these are followed 

 by a rudely spiral series of sub- globular chambers, the walls of 

 which are thicker than those of the proximal portion. The later 

 portion of the test is externally rough, appeariag coarsely notched 

 in section. This form has some affinities with Rwpertia and 

 possibly Haddonia. Height :|^inch (6 mm.) ; greatest width -iVinch 

 (4 mm.); thickness of the wall of the last chambers -5-0- inch 

 (0*5 mm.). 



Amphistegina lessomi, d'Orbigny. 

 This species is numerous in No. 521. 



Heterostegina depressa, d'Orbigny. 



The examples found in this limestone (521) are of extraordinary 

 dimensions and have very extensive and thin flanges. 



No. 646. Summit of Plying Fish Cove cliff ; from about the 

 same horizon as 521. A limestone largely composed of LitJio- 

 thamnion, foraminifera, and echinoderm remaius. 



Foraminifcra : 



Miliolina aheoUniformis, Brady. Eare. 

 Planorlulina larvata, P. & J. Frequent. 

 Gypsina globulus (Reuss). Hare. 



Polytrema mmiaceimi (Pallas), var. involva, nov. (One large 

 mass intergrown with LitTiothamnion.) 

 Amphistegina lessonii, d'Orb. Common. 

 Heterostegina depressa, d'Orb. Frequent. 

 Orhitoides {Lepidocyclina) sumatrensis, Brady. Common. 



The next specimen, No. 550, is a whitish limestone, compact, 

 rather dense and amoi'phous, owing probably to the presence of 

 granules derived from calcareous algaj. This is from about the 

 same horizon as 562 (p. 243). 



The organic remains constituting this rock are Lithothamnion, 

 foraminifera, echinoderm spines, polyzoa, and lamellibranch shells. 



