umbilicata 



462 Mr. Weaver ofi M. Alcide d'Orbigny's Vieiv 



Localities. 



28. Cristellaria Gaudryana Only at St Germain: rare. 



IVery common at Sens in the complete state, at 

 St. Germain only young, and adult very 

 rarely at Meudon. Occurs also in the chalk 

 of England. 

 „ ,. ^. , . I Very common at Meudon, St. Germain, and in 



30. Rotahna Voltziana | England. 



,,. , ... f Common at St. Germain, Meudon, and in 



31- Michelmiana ... | Engi,,„d ; rare at Sens. 



' Common at Meudon and St. Germain ; rare at 

 Sens and in England ; common also in the 

 tertiary tracts of Austria. Its analogHe is 

 found living at Rimini in the Adriatic, there 

 being no difference between the fossil and 

 living species. 

 St. Germain, Meudon, and England : rather 



-'•'• t.a==a I j.gyg_ 



,. . f St. Germain, England, and upper chalk of 



34. Cord.enana ...| Maestricht. 



35. Globigerina cretacea St. Germain and England. 



36. elevata Common near Sens; rare in England. 



37. Truncatulina Beaumontiana. Meudon and England : rare. 

 „,.._. r Common at St, Germain and Meudon ; rare at 



38. Rosahna Lorneiana j Sens and in England. 



39. Clementiana Rare at St. Germain, more common in England, 



40. Valvulina gibbosa St. Germain : rare. 



41. Verneuilina tricarinata St. Germain and Sens : rather rare. 



f Very common at Meudon ; rare at St. Germain 



42. Buhmmaobtusa | and in England. 



r Very common at Meudon, St. Germain, Sens, 



43. obhqua | ^^ j ;„ E„giand. 



. . f Very common at Sens ; rare at Meudon, St. 



44. variabilis | Germain, and in England. 



r Very common at Meudon, St. Germain, and 



45. brevis j gens. 



46. Murchisoniana ...St. Germain and England : rare. 



47. Uvigerina tricarinata Sens: very rare. 



„ ,. . r Very rare at Sens and St. Germain ; very com- 



48. Pyrulina acuminata | mon at Meudon. 



, . f Meudon, St. Germain, and Sens : rather com- 



49. Gaudryina rugosa ■( ^^^ 



. , r Rather common at Meudon, Sens, St. Germain, 



50- pupoides I ^,^j i„ England. 



51. Textularia trochus Only at Meudon. 



J Sens, Meudon, St. Germain, and England, 



52. turns .| .^jfj^out being common. 



53. Baudouiniana St. Germain and Meudon : rare. 



54. Sagrina rugosa St. Germain and Meudon. 



From the preceding list it appears, that of the fifty-four 

 species found in the white chalk of the Paris basin, thirti/- 

 eight occur at Meudon, thirty-three at Saint Germain, and 

 twenty-eight at Sens: of these numbers, nine are peculiar to 

 Meudon, fwo to Saint Germain, and six to Sens, while all 

 the others are simultaneously common to two or three locali- 

 ties, thus proving the perfect identity of the beds. It will be 

 seen also, that of these fifty-four species, t'wenty-t'mo are com- 

 mon to the white chalk of England also. 



