OLIVA.— Plate II. 



Fig. 



9-11. Melchersi, 1, Menhe. — 0. araneosa, Lamk. See 

 Plate III. f. 32.— Mazatlan. 



10. Aspinwall. 



12, 13. PUNCTATA, 6, Marrat. — 0. venulata, Lamk., as per 

 Reeve. — Mazatlau. 



14. OBLONGA, 11, Marrat. — S. America. 



15-17. ispiDA, 10, Link. — 0. fusiformis, Lamk. — W. Indies. 



17. OBEsiNA, Duclos, not Reeve. — Bermuda. 



18,19. SPLENDiDULA, 12, Soivh. — Pearl Island; Bay of Pa- 

 nama. 



20-22. puscATA, 8, Marrat. — California. 



