Erklärung der Tafeln. 
Tafel 1. 
1. 2. Cancellaria goniostoma Sow. — 3. 4. C. brevia Sow. — 5—8. C. rigida Sow. 
— 9. 10. C. contabulata Sow. — 11. 11. C. gODiostoma Sow. — 13 — 17. C. crenifera Sow. 
— 17. 18. C. Thomaaiana Crosse. — 19. C. brevia Sow. 
Tafel 2. 
1 — 9. Cancellaria ßeeveana Crosse. 
Tafel 3. 
1 — 4. Cancellaria asperella Lam. — 5. 6. C. melanostonaa Sow. — 7—9. C. sinensis 
Reeve. 
Tafel 4. 
1—4. Cancellaria reticulata Linne. — 5. 6. C. buccinoides Sow. — 7. 8. C. decus- 
sata Sow. 
Tafel 5. 
1. 2. Cancellaria ovata Sow. — 3. 4. C. eburnaeformis Rve. — 5. 6. C. solida Sow. 
— 7. 8. C. acuminata Sow. 
Tafel 6. 
1 — 4. Cancellaria tuberculata Sow. — 5—8. C. bullata Sow. — 9. 10. C. spirata Lam. 
Tafel 7. 
1—8. Cancellaria Spengleriana Desh. 
Tafel 8. 
1. 2. Cancellaria nodulifera Sow. — 3 — 6. C. cassidiformis Sow. — 7. 8. C. pyrum 
Ad. et Reeve. 
Tafel 9. 
1. 2. Cancellaria bifasciata Desh. — 3. 4. C. buccinoides Sow. — 5—8. C. inden- 
tata Sow. 
Tafel 10. 
1 — 4. Cancellaria urceolata Hinds. — 5 — 8. C. textilis Kiener. 
Tafel 11. 
1—9. Cancellaria cancellata Linne. 
Tafel 12. 
1—6. Cancellaria similis Sow. — 7 - — 9. C. chrysostoma Sow. 
Stoma Sow. — 12. 13. C. rugosa Lam. 
10. 11. C. haema* 
