PLATE 70 



1. Pollnlces heros Say, showing animal, p, 92. 



2, 3. Acmaea testudinalls amaena Say. p. 75. 



4. Vermlcularla splrata Phlllppl. p. 102. 



5. Littorlna obtusata Linne. 20 mm. p. 99. 



6. Littorlna saxltlle Ollvi. 12 mm. p. 99. 



7. Acmaea testudinalls alveus Conrad, profile. 8 mm. p. 75. 



8. The same, from below, p. 75. 



9. Lepidochiton ruber Lowe. 20 mm. p. 22. 



10. Chaetopleura aplculata Say. 1 inch. p. 2'6. 



11. Pollnlces heros Say. p. 92. 



12. Pollnlces dupllcata Say. p. 92. 



