26 Messrs. Parker, Jones, and Brady on the 



form is figured by D^Orbigny, in the ' For. Foss. Vien.' pi. 10. 

 figs. 13-15, under the name of Rotalia complanata. 



Model no. 43. Nonionina spharoides, D'Orb. Page 293, no. 1. 



Hub. From ballast-sand. PI. II. fig. 57. 



This is Pullenia spharoides, and bears no relation to the No- 

 nionine subtype. See Carpenter^s ' Introduction,' p. 184. It is 

 figured in D'Orbigny's 'For. Foss. Vien.' pi. 5. figs. 8-10 as 

 Nonionina hulloides. It is a small deep-water form, found both 

 recent and fossil. 



Model no. 44. Cristellaria Cassis*, F. & M. Page 290, no. 3. 

 Hab. Adriatic, near Rimini ; and fossil at Sienna. PI. I. fig. 45. 

 The young shell. The adult is represented in Model no. 83. 



•Model no. 45. Polystomella crispa*, Linn. Page 283, no. 1. 

 Hab. The Atlantic, the Mediterranean, and the Adriatic. 

 PI. III. fig. 96. 



Model no. 46. Nonionina Icevis, D'Orb. Page 294, no. 11. 

 Hab. Fossil near Paris. PI. III. fig. 97. 

 This is Nautilus incrassatus, F. & M. {Nonionina incrassata i 

 see Ann. Nat. Hist. ser. 3. vol. v. p. 101). 



Model no. 47. Cristellaria lavigata, D'Orb. Page 292, no. 19. 



Hab. Fossil near Caen (Jurassic). Plate I. fig. 43. 



A not uncommon form of Cristellaria, in which the early 

 chambers are rotulate, and the later chambers strive to take a 

 rectilinear arrangement. D'Orbigny refers, on the same page, 

 to other Cristellaria from the Limestone of Caen, namely C. 

 lamellosa, C. Cadonensis, C. Lituus ; and at p. 259 he refers to 

 Planularia elongata, P. depressa, and P. striata from the same 

 limestone. 



Model no. 48. Peneroplis planatus, F. & M. Page 285, no. 1. 

 .Hab. Mediterranean, New Holland. PI. I. fig. 18. 

 This is the narrow variety, P. arietinus, Batsch. 



Model no. 49. Planulina Ariminensis*, D'Orb. 

 Page 280, no. 1, pi. 5. figs. 1-3 bis. 

 Hab. Adriatic, near Rimini. Plate III. fig. 78. 

 A flat, thin Planorbulina, with raised chamber-walls. 



Model no. 50. Alveolina Boscii*, Defrance. Page 306, no. 5. 

 Hab. Fossil near Paris. PI. I, fig. 23. 



The subtypical fusiform Alveolina, for which Montfort's trivial 

 name, A. sabulosa, takes precedence. 



