132 



SPHiERULITES. 



Encijcl. Meih. plate Yl%fig. 7, 8, 9- 

 One species. 



RADIOLITES. 



EncycU Meih. plate i7 c 2 t fig.l- 

 Three species. 



CALCEOLA. 



Knorr. Petri/, fig. 5, 6. 

 One species. 



BIROSTRITES. 



Sowerby's Genera, No.M, plate 3. 



One species. 



The abovefour genera are fossils, and therefore, though 

 necessarily introduced to complete the arrangement of 

 Lamarck's system, need only here be mentioned in the 

 places which he has assigned to them, as forming in- 

 termediate and connecting links in the recent genera of 

 Testaceae, which are more immediately the object of 

 consideration in this work. 





