Plate 1 
FIGURE PAGE 
1. Dentalium agassizii Pilsbry and Sharp. 19 
Bulletin of the Museum of Comparative Zoology. 
2. Dentalium vallicolens Raymond. 13 
3. Dentalium rcctius Carpenter. 11 
4. Cadulus fusiformis Pilsbry and Sharp. 15 
Tryon and Pilsbry, Manual of Conchology. 
5. Dentalium dalli Pilsbry and Sharp. 10 
6. Cadidus stearnsii Pilsbry and Sharp. 16 
Tryon and Pilsbry, Manual of Conchology. 
7. Siphodentalium quadrifissatum Pilsbry. 14 
Tryon and Pilsbry, Manual of Conchology. 
8. Cadulus californicus Pilsbry and Sharp. 16 
9. Cadidus tolmei Dali. 16 
Bulletin, Natural History Society of British Columbia. 
10. Dentalium pretiosum Sowerby. 13 
11. Haminoea olgae Dali. 42 
12. Acteon fraski Stearns. 24 
Proceedings of the United States National Museum. 
13. Cadidus hepburni Dali. 13 
Bulletin, Natural History Society of British Columbia, No. 2. 
14. Microglyphis breviculus Dali. 26 
Bulletin, Museum of Comparative Zoology, 43. 
15. Rictaxis coronadoensis Dali.Not in text 
16. Melampus olivaceus Carpenter. 54 
Proceedings of the United States National Museum. 
17. 17a. Acteon punctocoelata Carpenter. 24 
American Journal of Conchology. 
18. Acteon painei Dali. 25 
Bulletin 112, United States National Museum. 
19. 20. Acteon punctocoelata Vancouverensis, n. subsp. 25 
Note—U nless otherwise stated the photographs were made by Crandall and the 
specimens are in the Stanford Collection, natural size. 
