16 Transactions of the Society. 



Ammodiscus Reuss. 

 Ammodiscus incertus (d'Orbigny). 



Operculina incerta d'Orbigny, 1839, Foram. Cuba, p. 71, pi. vi, figs. 16, 17. 

 Ammodiscus incertus Brady, 1884, Chall. Rept., p. 330, pi. xxxviii, figs. 1-3. 



Three occur. One is large and two are of medium size. Of 

 the latter, one is white. 



Ammodiscus tenuis Brady. 



Ammodiscus tenuis Brady, 1881, Quart. Journ. Micr. Sci., vol. xxi, N.S., 



p. 51. 

 A. tenuis Brady, 1884, Chall. Rept., p. 332, pi. xxxviii, figs. 4-6. 



The two tests found appear to be Megalospheric, and although 

 ■of fair size consist of only about four convolutions. The tests are 

 rather flat, but the initial chamber of the first convolution is raised. 

 Yery pale in colour. 



Am,m,odiscus charoides (Jones and Parker). 



'Trocjidminina squamata charoides Jones and Parker, 1860, Quart. Journ. 



Geol. Soc, vol. xvi, p. 304. 

 Ammodiscus charoides Brady, 1884, Chall. Rept., p. 834, pi. xxxviii, figs. 



10-16. 



Excellent specimens occur, highly polished, and of a rich 

 ferruginous colour. 



Trochammina Parker and Jones. 

 Trochammina conglohata Brady. 



Trochammina co7iglolata Brady, 1884, Chall. Rept., p. 341, pi. xl, fig. 8, 9. 

 T. conglohata Flint, 1899, Rec. Foram. Rept., W.S., Nat. Mus. for 1897, 

 p. 281, pi. xxvi, fig. 2. 



Four specimens occur, which I think I am right in placing 

 under this heading. They agree better with Flint's than with the 

 "Challenger" figure. 



Trochammina trullisata Brady. 

 Trochammina trullisata Brady, 1884, Chall. Rept., p. 342, pi. xl,figs. 13-16. 



The small form only occurs, similar to fig. 14 in the above 

 reference. 



Trochammina nitida Brady. 



Trochammina nitida Brady, 1881, Quart, Journ. Micr. Sci., vol. xxi, N.S., 



p. 52. 

 T. 7iitida Brady, 1884, Chall. Rept., p. 339, pi. xli, figs. 5, 6. 



A solitary, typical example. 



