228 Christmas Island. 



This form is here represented, by numerous examples cut in 

 various directions ; thus a good idea may be gathered of the actual 

 shape of the test. 



The shell-wall is fairly thin and simple, and the test is flat on 

 the upper, and evenly inflated on the inferior, face. In the 

 regularity of the chambers this form agrees very closely with 

 the variety figured by d'Orbigny from the Miocene of Vienna 

 under the name of Trimcatulina boiceana,^ which form has been 

 included in the synonymy of T. lohatula by H. B. Brady. The 

 chances that these sections represent a Pulvimdina are small, on 

 account of the comparative thinness and simplicity of the outer 

 walls of the chambers, although the two genera have isomorphous 

 forms. 



Pulvinulina repanda (Fichtcl & Moll). (PI. XX, Fig. 1.) 



Nautilus rcpandus, Fichtel & Moll, 1798, Test, micr., p. 35, pi. iii, figs. a~d. 

 RotaUa repanda (F. & M.), Parker & Joues, 1860, Ann. Mag. Nat. Hist., 



ser. Ill, vol. V, p. 175, No. 25. 

 Piihinula repanda (F. & M.), P. «& J., in Carpenter, 1862, Introd. Foram., 



p. 210. 

 PIneenttila repanda (F. & M.), Berthelin, 1878, Foram. Bourgneuf et Pornichet, 



p. 41, Xo. 68. 

 Fiilnnulina repanda (F. & M.), Terrigi, 1880, Atti dell' Accad. Pontif., 



ann. xxxiii, p. 206, pi. iii," fig. 61 ; Brady, 1884, Kep. Chall., 



vol. ix, p. 684, pi. civ, figs. 18^?-^. 



Several good transverse and vertical sections of a pulvinuline 

 form, with a thick test, and with characteristically coarse pores, 

 have been noted in the yellow limestone (jS'o. 2) [see photograph, 

 Fig. 1]. The average diameter of the test is oV inch. These 

 examples compare most closely with the above species, which is 

 xery frequent and large in the coral-sands at the present time. To 

 aid the comparison, a section of a recent specimen has been made 

 and examined, and bears out this conclusion. 



Rotalia scJiroeteriana, Parker & Jones. 



JR. schroeteriana (Parker & Jones MS.), Carpenter, 1862, Introd. Foram., 



p. 213, pi. xiii, figs. 7-9. 

 R. tuberosa, Karrer, 1867, Sitzungsh. k. Akad. Wiss. Wien, vol. iv, p. 349, 



pl. i, fig. 4. 

 M. achroeteriana, Parker & Joues, Brad}-, 1884, Rep. Chall., vol. ix, p. 707, 



pl. 105, figs. la-c. 



Amongst the rotaline sections in specimen No. 2 there are some 

 strongly developed examples, coarsely porous, sub-orbicular, and 

 with the surface irregularly relieved with rounded prominences. 

 These specimens appear to agree most nearly with the above 

 species. R. sclirocteriana has been described from Miocene deposits, 

 and is also found living in the Eastern Archipelago. 



1 Foram. Foss. Vienne, 1846, p. 169, pl. ix, figs. 24-26. 



