204 



LUDWIG H, PLATE, 



ürmollusk 



/ 



Chiton 



Chitonellus 



Praerhipidoglossa 



Solenogastres 



Dentalium. 



Lamellibranchia 



Praegastropoda 



Pleurotomaria 



Haliotis 



FissureUa 



Trochidae 



Patella 



Actaeon 



Höhere 

 Prosobranchia 



Cephalopoda 



Tectibranchia 



Nudibranchia 



Oncidium 

 Vaginula 



Auricula 



Stylommatoph. 

 Basommatoph. 



