340 Messrs. W. K. Parker and T. R. Jones on the 
coquilles microscopiques sont répandues dans les mers des deux 
hémisphéres, et que de trés-fortes raisons font soupconner qu’il 
n’est aucune profondeur qui en soit exempte, et leur multiplica- 
tion y est prodigieuse.” 
12. Vol. i. p. 94. 24¢ genre. Oreas subulatus: This is a modi- 
fied figure of Cristellaria acutauricularis, F. & M. 
13. Vol. i. p. 102. 26¢ genre. Jesites vermicularis. After a 
figure by Soldani in Testaceogr. i. pl. 30. fig. X. This is a 
minute discoidal Serpula. 
14. Vol.i. p. 106. 27¢ genre. Charybs plicatus. After Soldani’s 
Testaceogr. 1. pl. 29. fig. K. This also is a minute discoidal 
Serpula. 
15. Vol. i. p. 110. 28¢ genre. Cidarollus plicatus. After Sol- 
dani, Testaceogr. 1. pl. 36. fig. S. A common variety of Rotalia 
repanda, F. & M.; the same as R. pulchella, D’Orb. Modéles, 
No. 71. 
16. Vol.i. p. 114. 29° genre. Cortalus Pagodus. This may 
possibly be a Rotalia ; but more probably it is a minute Gastero- 
podous shell. Such a turbinate little shell is figured by Soldani, 
Testaceogr. pl. 14. Vas. 95.X ; but De Montfort’s reference to 
Sold. Testac. pl. 86. Vas. 162. X. is quite wrong. 
17. Vol. i. p. 122. 31¢ genre. Cibicides refulgens. After Sol- 
dani, Testaceogr. i. pl. 46. fig.o0. This is the Truncatulina 
refulgens, D’Orb. Ann. Sc. Nat. vii. p. 279, No. 5; Modéles, 
No. 77. In the plate of the ‘Testaceogr.’ to which both De 
Montfort and D’Orbigny refer (the latter, however, quoting 
“48” instead of “ 46”) are two very similar forms of two very 
distinct species. One of these (fig. m7) is a small and extremely 
conical form of Rotalia repanda (from the Chalk it has been de- 
scribed as R. Micheliniana by D’Orb., and as R. nitida by Reuss, 
and there are several allied varieties, all of deep-sea habitats) ; the 
other (fig. 0 0), usually a somewhat larger shell, and still more 
conical, is of totally different parentage ; it is an extremely con- 
tracted form of Planorbulina farcta, inhabiting rather deep water; 
and gentle gradations may be readily traced between this and 
Truncatulina lobatula. The similarity of these two forms, at first 
sight perplexing, has led D’Orbigny to question whether they be 
the same or not. We may point out, however, that the extremel 
smooth, glossy, flat, spiral surface in 7. refulgens, with its thick 
septal walls, more translucent than the cell-walls (as well indi- 
cated in Soldani’s figure), and its coarser pores, are important 
diagnostics between this and fig.nn. The latter, with sulcate 
septal lines on its spiral face, has a tendency to gibbosity on 
this surface, and has often minute tuberculations, which help to 
make it an opakely white shell, as compared with the glassy T. 
refulgens. Its alliances with R. repanda and its sub-variety R. 
