PLATE II. 



Raphistoma lapicida (page 12). 



Figure 1. Raphistoma lapicida. Side view, with mouth. 



" 2. . Spire of ditto. 



« 3. . Base of ditto. 



Raphistoma aperta (page 12). 



" 4. Raphistoma aperta. Upper, lower and side view. 



Helicotoma planulata (page 14). 



(< 5. Helicotoma planulata. View of the spire. 



" 6. . Same specimen ; under view. 



" 7. . Do. side view. 



" 8. . Var. muricata. 



Helicotoma ? spinosa (page 15). 



" 9. Helicotoma 1 spinosa. Slightly magnified ; the natural size is indicated 



by the cross lines. 

 " 10. Under view of the same, also magnified. 



Helicotoma larvata (page 15). 



" 11-13. Helicotoma? larvata. Upper, under and side views. 



" 14. . The same species, encrusted by a sponge 



{Stromatocerium rugosum). 



