38 Messrs. W. K. Parker and T. R. Jones on the 
3. Orbitolina corrugata, William- Recent: British, Arctic, and Mediter- 
son. ranean Seas. 
4. ——annularis, P.§ J. .. Recent: Melbourne. 
5. vesicularis, P.& J... Recent: Australia. 
6. —— congesta, P.& J..... Recent: Australia. _ 
Tertiary : Bordeaux, St. Domingo, 
: Palermo. 
Ce eo et ia British, Medit., W. & E. In- 
dian, and Pacific Seas. 
8. —— spherulata, P.& J... Recent: Fiji and New Zealand. 
9. -—— spherulolineata, P. § J. Cretaceous: Ciply. 
10. —— globularis, Phillips. . thecmiige England an Europe. 
ertiary : Grignon. 
11. —— concava, Lamk. [Ty oJ Cretaceous : England and France. 
12. —— lenticularis, Blumenb... Cretaceous: England, France, and 
Maestricht. 
34. Orbulites concava. Hist. An. s. Vert. vol. u. p. 197, 
No. 4. 
“OQ, uno latere convexa, subantiquata; altero concava. Ha- 
bite: fossile de la commune de Ballon, département de la Sarthe, 
& quatre lieues N.-E. du Mans. Communiquée par MM. Menard 
et Desportes. Sa surface convexe offre souvent des cercles con- 
centriques (’accroissement.” 
This is the Orbitolina concava; it is figured by Michelin, 
Icon. Zooph. pl. 7. f. 9. We regard it as the type of a species 
including numerous varieties ; see above. 
35. Orbulites macropora. Hist. An.s. Vert. i. p. 197, No. 5. 
Lamarck gives no locality for his specimen. Defrance says 
that O. macropora is found at Maestricht. Goldfuss indicates 
Grignon as the locality for the specimen which he has figured as 
Orbitulites macropora, Lam. (Petref. pl. 12. f.8). We have not 
seen such a large-chambered Orbitolite in the Grignon deposits ; 
but we have obtained very fine specimens of the O.macropora from 
the Chalk of Maestricht, whence Faujas, Hafenow, and Bronn 
also got it. D’Orbigny refers. it (under the name of Cupulites 
macropora) to Grignon (Prodrome, ii. p. 397). Galeotti men- 
tions it as occurring at Foréts and St. Gilles (Tertiary), Belgium ; 
and Serres found jt in the building-stone of Montpellier (Leth. 
Geogn. 3rd edit. ii. pt. 5. p. 967). 
Bronn unnecessarily distinguishes this form by a generic 
appellation—Omphalocyclus macroporus. At first sight this Or- 
bitolite has distinctive characters, compared with the common 
varieties of O. complanata—such as its small primordial chamber, 
the strong limbation of the septa, the comparatively thick disk 
and large chambers, readily worn down so as to resemble pores ; 
but these features are not accompanied by any peculiarity of 
structure essentially different from the mode of growth of the 
later and world-wide O. complanata. 
ae ee 
