Plate 2 
FIGURE PAGE 
1 a, b, c. Acteocina culcitella Gould . 27 
Boston Journal of Natural History. 
2a, b. Acteocina magdalenensis Dali. 31 
3. Return harpa Dali . . 33 
Magnified twice. 
4. Acteocina oldroydi Dali . 28 
Magnified twice. 
5. Cylichnella alba Brown . 39 
Magnified twice. 
6. Acteocina eximia Baird . 28 
Magnified twice. 
7. Pcdipcs unisulcatus Cooper . 53 
Proceedings of the California Academy of Sciences. 
8. Cylichnella attonsa Carpenter . 40 
9. Volv-ulella cylindrica Carpenter . 34 
10. Retusa xystmpi Dali . 33 
Magnified three times. 
11. Volvulella califbrnica Dali . 34 
12. Diaphana calif ornica Dali . 37 
Magnified twice. 
13. Retnsa semen Reeve . 32 
American Museum of Natural History. 
14. Pcdipcs liratus Binney . 54 
Proceedings of the United States National Museum. 
15. Diaphana brunnea Dali . 37 
Magnified twice. 
16a, b. Cadinia reticulata Sowerby . 55 
American Journal of Conchology. 
17. Williamia peltoides Carpenter . 58 
Bulletin 112, United States National Museum. 
18. Siphonaria brannani Stearns . 57 
Bulletin 112, United States National Museum. 
19a, b. Williamia vernalis Dali. 58 
American Journal of Conchology. 
20 a, b. Tylodina fungina Gabb . 51 
Bulletin 112, United States National Museum. 
21. Mangilia Icvidensis Carpenter . 144 
Bulletin 112 , United States National Museum. 
22. Liomestts mix Dali. , . . . 199 
Bulletin of Com pa rat be Zoology. 
23. Liomcsus ooidcs v\ canaliculatus Dali . 198 
Bulletin of the Museum of Comparative Zoology, Cambridge. 
24. Mangilia carlottae Dali . 133 
Proceedings of the United States National Museum. 
