1894. 



SOME NEW BOOKS. 



305 



Placophora 



■Aplacophora 

 Primitive Post-Chitonal 



Form 



Bivalvia 



Cephalopoda 



Scaphopoda 

 Chiastoneura 



Docoglossa 



Pulmonata S" 

 (Pteropoda) v> 



Rhipidoglossa 



Fissurellida; 



Haliotidse 



Trochidse 



\ 



Neritacea 



Architjenioglossa 



./ 



\ 



\ 



Brevicommissurate 

 Neotaenioglossa 



Rachiglossa 



Toxiglossa (?) 



Longicommissurate 

 Neotsenioglossa 



Heteropoda. 



