CORRIGENDA. 



Part I, p. 27,/or "Purpuroidea Moreausia," read "P. Morrisii, Buv. ;" Purpura Moreausia, is considered 



by M. Buvignier to be a distinct species, 

 p. 48, for "Eulima pygraeea," read "Eulima vagans (junior)." 

 p. 93, for "Patella nana," read " Patella cingulata (junior)." 

 Part II, p. 24, for " Inoceramus Fittoni, Tab. iv," read "Tab. iii." 



p. 48, sixth line from the bottom, erase the four words within the parenthesis. 



p. 49, second line, erase the last three words. The raised ledge which supports the anterior 



muscular impression in Macrodon separates it from other sub-genera of Area ; in Cuculleea the 



ledge is posterior. 

 p. 75. Both Cypricardie: Bathonica, d'Orb. and C. cordiformis,Desh., occur in the Inferior Oolite of 



the Cotteswolds but in different beds, further observations have induced us to regard them as 



only varieties of the same species induced by peculiarities of the beds in which they occur. 



