APLYSIA 



mates. Several are found on our own shores. We have 

 never met with any fossil remains of the shell of this 

 Genus. 



We have figured in our plate 



Fig. 1. Aplysia Petersoni, 2 views. 



2. — Brasiliensis ? 



3. — — concava, nobis. 



4. quadrata, nobis. 



