1894. 



SOME NEW BOOKS. 



305 



Placophora 



i -% 



I "^Aplacophora 



Primitive Post-Chitonal 

 Form 



/ 



Bivalvia 



Cephalopoda 



Scaphopoda 

 Chiastoneura 



a^'^ 



Pulmonata §■ 

 (Pteropoda) p' 



Rhipidoglossa 



Docoglossa 



Fissurellidas 



Haliotidae 



Trochidse 



Neritacea 



Architaenioglossa 



/ 



/ 



\ 



\ 



/ 



/ 



\ 



/ 



Brevicommissurate 



Neotaenioglossa 



I 



Rachiglossa 



Toxiglossa (?) 



\ 



Longicommissurate 

 Neotaenioglossa 



3 



a 



Heteropoda. 



