PLATE III. 
Fig. 
1, la, c. Alaria armata, p. 16, back view. 
16. — — front view; d, portion magnified. 
OF Alaria hamus, p. 16. 
2a. —- — portion magnified. 
26. — = front view. 
3, 3a.  Alaria levigata, p. 17. 
4,46. Alaria hamulus, py. 17, back view. 
Aa. = — specimen magnified. 
5. Alaria Phillipsii, 7. 18; and p. 111, Plate XV, figs. 15, 15a. 
Da. _- _ portion magnified. 
6. Alaria pagoda, p. 18; and Plate XIII, figs. 4, 4a. 
7, 7a. — Alaria atractoides, p. 19. 
8. Alaria hexagona, p. 19. 
9. Alaria paradoxa, p. 20, front view; and Plate XIII, fig. 3. 
9a. — —_— var. a, back view. 
10. — — back view. 
11,114. Alaria trifida, p. 21, front view. 
lla. —_. — back view. 
Lle. = = portion magnified. 
12a. Alaria parvula, p. 22. 
126. — -— magnified. 
13, 13a. Alaria cirrus, p. 22. 
14. Pteroceras ignobilis, p. 14. 
15: —  Bentleyi, p. 15, front view. 
15. — a back view. 
16. — — var. of, back view. 
