Nomenclature of the Foraminifera. 435 



34. Numraulina rotulata, Lamarck, sp. Page 296, no. 8. 

 This is Cristellaria rotulata, Lam. sp. Ann. N. H. ser. 3. v. 

 p. 296. D'Orbigny correctly placed this form under Cristellaria 

 in his memoir on the Foraminifera of the White Chalk of Paris 

 (Mem. Soc. Geol. France, 1840, iv. p. 26). 



35. Orbiculina numismalis, Lamarck. Page 305, no. 1, pi. 17. 

 f. 8-10. Modele no. 20. This is Orbiculina adunca, F. & M. sp., 

 including its modifications or varieties angulata and Orbiculus. 

 Ann. N. H. ser. 3. v. p. 181. 



36. Operculina complanata, Defrance, sp. (Erroneously re- 

 ferred to "Basterot" by D'Orbigny.) Page 281, no. 1, pi. 14. 

 f. 7-10. Modele no. 80. The history of Operculina and its 

 relationship to Nummulina are treated of in Ann. N. H. ser. 3. 

 viii. p. 229. See also Carpenter's 'Introd. Foram.' p. 247. 



37. Peneroplis opercularis, Lamarck, sp. Page 286, no. 6. 

 Renulites of Lamarck ; misplaced in Peneroplis by D'Orbigny ; 

 and really a peculiar modification of Vertebralina. In Annals 

 N. H. ser. 3. v. p. 471, we treated of it as V. striata, D'Orb., 

 var. opercularis. See also Carpenter's 'Introd. Foram.' p. 74, 

 pi. 5. f. 18. 



38. Peneroplis planatus, F. & M. sp. Page 285, no. 1. Mo- 

 deles nos. 16 & 48. Ann. N. H. ser. 3. v. p. 179; and Carpen- 

 ter's ' Introd. Foram.' p. 84. 



39. Planularia Auris, Defrance. Page 260, no. 5. Ann. N. H. 

 ser. 3. xii. p. 215. Planularia is a noticeable member of the 

 Cristellarian subgroup ; and, for convenience-sake, several of the 

 Planularian forms are recorded binomially. The form under 

 notice may, however, be regarded as a very thin outspread va- 

 riety of Cristellaria Cymba, D'Orb. 



40. Planularia Crejjidula, F. & M. sp. Page 260, no. 6. 

 Ann. N. H. ser. 3. v. p. 114. Though really only a delicate, 

 elongate, flattened Cristellaria, yet, like some others of the group, 

 this pretty form enjoys a special name, for the convenience of 

 collectors and others. 



41. Polystomella ambigua, F. & M. sp. Page 285, no. 10, 

 A flattish and crenulate variety of P. crispa. Ann. N. H, ser. 3. 

 V. p. 103. 



42. Polystomella craticulata, F. & M. sp. Page 284, no. 3. 

 See Ann. N. H. ser. 3. v. p. 105, and Carpenter's 'Introd. Fo- 

 ram.' p. 279, for an account of this very thick, largely umbonate, 

 and frequently gigantic Polystomella. 



43. Polystomella crispa, Lm/i. sp. Page 283, no. 1 . Modele 

 no. 45. Ann. N. H. ser. 3. v. p. 105, and Carpenter's 'Introd. 

 Foram.' p. 278. 



44. Polystomella strigillata, F. & M. sp. Page 284, no. 4. 

 With Fichtel and Moll's two varieties of P. strigillata, D'Or- 



