340 Messrs. W. K. Parker and T. R. Jones on the 



coquilles microscopiques sont repandues dans les mers des deux 

 hemispheres, et que de tres-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 e genre. Oreas subulatus. This is a modi- 

 fied figure of Crist ellaria acut auricular is, F. & M. 



13. Vol. i. p. 102. 26 e genre. Jesites vermicularis. After a 

 figure by Soldani in Testaceogr. i. pi. 30. fig. X. This is a 

 minute discoidal Serpula. 



14. Vol. i. p. 106. 27 e genre. Charybs plicatus. After Soldani's 

 Testaceogr. i. pi. 29. fig. K. This also is a minute discoidal 

 Serpula. 



15. Vol. i. p. 110. 28 e genre. Cidarollus plicatus. After Sol- 

 dani, Testaceogr. i. pi. 36. fig. S. A common variety of Rotalia 

 repanda, F. & M. ; the same as R. pulchella, D'Orb. Modeles, 

 No. 71. 



16. Vol. i. p. 114. 29 e 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. pi. 14. Vas. 95. X ; but De Montfort's reference to 

 Sold. Testae, pi. 86. Vas. 162. X. is quite wrong. 



17. Vol. i. p. 122. 31 e genre. Cibicides refulgens. After Sol- 

 dani, Testaceogr. i. pi. 46. fig. o o. This is the Truncatulina 

 refulgens, D'Orb. Ann. Sc. Nat. vii. p. 279, No. 5 ; Modeles, 

 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. n n) 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. o o), 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 extremely 

 smooth, glossy, flat, spiral surface in T. 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. n n. 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. 



