Nomenclature of the Foraminifcra. 25 



Model no. 36. Gyroidina Soldani, D'Orb. Page 278, no. 5. 



Hab. Adriatic, near Rimini. PI. III. fig. 86. 



As we have before stated, there is no sufficient reason for the 

 separation of either this or G. orbicularis from the genus Rotalia. 

 It is a small deep-sea variety, somewhat bolder, and having a 

 thicker shell than G. orbicularis. 



Model no. 37. Truncatulina tuberculatum, D'Orb. 

 Page 279, no. 1. 



Hab. All the shores of European seas. Fossil near Bordeaux, 

 Paris, and Castel-Arquato. PI. II. fig. 77. 



This is Truncatulina lobatula, W. & J., sp., which is the com- 

 monest variety of Planorbulina farcta, F. & M., sp. 



Model no. 38. Rosalina Parisiensis, D'Orb. Page 271, no. 1. 



Hab. Fossil near Paris. PI. II. fig. 70. 



This is a flat, outspread, thin-edged variety of Discorbina 

 trochidiformis, Lamk., sp.; a good subspecies — the type being 

 D. Turbo, D'Orb., sp. It is commonly somewhat concave on its 

 under surface. Discorbina ochracea [Rotalina ochracea, Will. 

 Rec. For. Gt. Brit. pi. 4. fig. 112, and pi. 5. fig. 113) is a feebler 

 form, closely allied to the one uuder consideration. 



Model no. 39. Rotalia rosacea, D'Orb. Page 273, no. 15. 



Hab. Fossil, Bordeaux. PI. II. fig. 71. 



This is another useful subspecies of Discorbina Turbo, D'Orb., 

 sp. It is identical with D'Orbigny's Asterigerina Planorbis and 

 "Williamson's Rotalina Mamilla. 



Model no. 40. A?nphistegina vulgaris, D'Orb. Page 305, no. 8. 



Hab. Fossil on the borders of the Lagoon of Tau, and near 

 Bordeaux. PI. III. fig. 91. 

 The type of the genus. 



Model no. 41. Cassidulina lavigata, D'Orb. Page 281, no. 1, 

 pi. 15. figs. 4, 5. 



Hab. From ballast-sand. PI. II. fig. 67. 

 One of the species figured by D'Orbigny in the plates illus- 

 trating his memoir, and, as such, noticed in our previous paper. 



Model no. 42. Anomalina elegans, D'Orb. Page 282, no. 4. 



Hab. Fossil near Bordeaux. PI. II. fig. 73. 



The generic term Anomalina should properly be confined to 

 the bold and more or less biconcave forms of the Planorbuline 

 type. This Model illustrates Discorbina, — a good intermediate 

 subspecies, passing insensibly into D. vesicularis. The same 



