91 Order OPISTHO-BRANCHIATA 



Fain. Bullidse. 



Scaphander (Bui a) lignarius. Britain. 

 Bulla nebulo. c a. India. 



, adansoni. North Africa. 

 Bullia digitalis, var. achatina. South Africa. 

 Diaphana hyalina. florueo, 

 Haminea hydatis. Mediterranean. 



Class B It A H I O P O DA 

 Fam. Tare brat ulidee. 



Terebratula rubicunda. N?w Zealand. 



Class OOXOHIFEKA 



Fam Ostreidse. 



Pecten jacobjeu*. Mediterranean. 

 ,, maximus. Britain. 

 ,, varius. Mediterranean. 



young. 



erubescens. New Zealand. 

 sangnineus. Ramlek, Egypt. 

 ,, septcmradiatus South Africa. 



