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.fy J. . . Recent : Melbourne. 



5. vesicularis, P. fy J. . . Recent : Australia. 



6. congesta, P. 8f J. . . . . Recent : Australia. 



{Tertiary : Bordeaux, St. Domingo, 

 Palermo. 

 Recent : British, Medit., W. & E. In- 

 dian, and Pacific Seas. 



8. sphserulata, P. 8f J. . . Recent : Fiji and New Zealand. 



9. sphaerulolineata, P. Sf J. Cretaceous : Ciply. 



10. globularis, Phillips. . . / Cretaceous : England an Europe. 



& I Tertiary : Grignon. 



11. concava, Lamk. [Type.] Cretaceous : England and France. 



12. lenticularis, Blumenb. . . Cretaceous : England, France, and 



Maestricht. 



34. Orbulites concava. Hist. An. s. Vert. vol. ii. p. 197, 

 No. 4. 



" O. uno latere convexa, subantiquata ; altero concava. Ha- 

 bite : fossile de la commune de Ballon, departement de la Sarthe, 

 k quatre lieues N.-E. du Mans. Communiquee par MM. Menard 

 et Desportes. Sa surface convexe offre souvent des cercles con- 

 centriques d'accroissement." 



This is the Orbitolina concava; it is figured by Michelin, 

 Icon. Zooph. pi. 7. f. 9. We regard it as the type of a species 

 including numerous varieties ; see above. 



35. Orbulites macropora. Hist. An. s. Vert. ii. 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. pi. 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 Brorm 

 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 Forets and St. Gilles (Tertiary), Belgium ; 

 and Serres found it 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. 



