440 Mr. H. J. Carter on Specimens 



FORAMINIFERA. 



Sessile Species. 



Genus Carpenteria, Gray. 



-Generic characters. Test conical, sessile ; composed of elon- 

 gated more or less triangular chambers developed successively 

 in a spire, more or less regularly round a hollow axis, towards 

 which they are inclined and into which they open. Chambers 

 foraminated on the surface, and more or less filled in the in- 

 terior with fragmentary sponge-spicules. Hollow axis pro- 

 longed from the summit into a branched fruticose head. 



Carpenteria utricularis and Carpentaria monticularis. 



The former abounds on the Melobesian nodules of the Gulf 

 of Manaar ; but of the latter I have only found one specimen. 



In 1876 (Ann. vol. xvii. p. 210, pi. xiii. figs. 11-16), I 

 described and illustrated C. utricularis under the name of 

 Polytrema utriculare, and in 1877 (Ann. vol. xix. p. 211) 

 reverted to the old generic appellation, viz. Carpenteria, 

 adding at the same time {ibid. pi. xiii. figs. 9-12) a new 

 species, viz. C. monticularis) while in 1878 (' Palasonto- 

 graphica,' [3] xxv. 1, Taf. xl. figs. 58-61) Prof. Mobius 

 figured the same en masse, under the name of Carpenteria 

 rkaphidodendron. 



Genus POLYTKEMA. 



Gen. char. Test massive, more or less divided at the sum- 

 mit, composed of cells or chambers developed laminar ly upon 

 each other, the outer ones foraminated on the surface and 

 opening into the inner ones, whose cavities, communicating 

 with each other, finally terminate at the ends of the 

 branches or lamina? into which the summit may be divided, 

 where they are more or less filled with fragmentary sponge- 

 spicules. 



Polytrema miniaceum, De Blainville. 



This species, which abounds everywhere in the tropics 

 (but is rare, perhaps, beyond the 35th parallel on each side of 

 the equator), varying in colour from deep red to pink, cinna- 

 mon, and pure white, is in its pink colour equally abundant in 

 the Gulf of Manaar, growing apparently indiscriminately on 

 every organism that will bear its weight. Accompanying it 

 is another species, which, although not so frequent, being new 

 I shall designate as P. cylindricum, in reference to its form, as 

 will be seen hereafter. Finally, there is a third organism on the 



