Illustrations of the Anatomy and of Shells 473 



10 



11 



13 16 





14 



17 



^^ 



18 



15 



^im 



26 



19 



31 



32 



20 



21 



22 



27 



28 



33 



12 



23 



24 



25 



29 



30 



PLATE 118 



