PLATE L. 
Concavum-zone. 
Figs. 1 — 3. — Zproheria parvispinata, S. Buchman. 
Fig. 1. — Side view of an immature example. Bradford Abbas, Dorset. My 
Collection. (Page 296.) 
Fig. 2. — Front view of the same fossil. 
Fig. 3. — Back view. 
Figs. 4 — 10. — ZuECHEEiA iNOONSTANS, 8. Buchwian. 
Fig. 4. — Side view of an example with the test preserved, showing ribs with 
small spines at their outer ends, but on the last half-whorl ribs without any 
spines. There is even a tendency for the ribs to become inconspicuous. Brad- 
ford Abbas. My Collection. (Page 297.) 
Fig. 5. — Front view. 
Fig. 6. — Back view showing strige crossing the abdomen with a bow-like bead. 
Fig. 7. — Part of the suture-line showing the deep superior lateral saddle. 
Fig. 8. — Side view of an older example with very little test remaining. The 
absence of test renders the spines somewhat inconspicuous, but they seem to fail 
about a whorl and a half from the end. The ribs are stronger than in the other 
specimen. Bradford Abbas. My Collection. (Page 297.) 
Fig. 9. — Front view. 
Fig. 10. — The suture-line showing the deep superior lateral saddle, and the 
dilference between it and the inferior lateral saddle. 
Figs. 11 — 13. — SoNNiNiA MULTI8PINATA, 8. Buclcman. 
Fig. 11. — Side view showing the regularity of the spines. Bradford Abbas . 
My Collection. 
Fig. 12. — Front view showing the carina bordered by sulci. 
Fig. 13. — Suture-line. 
Figs. 14, 15. — SoNNiNiA spiNiPEEA, ;S^. BucJcman. 
Fig. 14. — Side view of an immature example showing irregularly placed 
spines. The test and spines are very nicely preserved. Bradford Abbas. My 
Collection. 
Fig. 15. — Front view showing the length of the spines. 
Figs. 16 — 22. — SoNNiNiA CRASSisPiNATA, 8. Buchvian. 
Fig. 16. — Side view of an immature example with well-preserved test, showing, 
first, regular spines ; later, irregular spines separated by ribs. Bradford Abbas. 
My Collection. (See PI. XL VIII, figs. 16, 17.) 
Fig. 17. — Front view. 
Fig. 18. — Part of the suture-line. 
Fig. 19. — Side view of a smaller example, showing irregular spines at an earlier 
date. Bradford Abbas. My Collection. 
Fig. 20. — Front view, showing flat abdomen correlating with regular spines as 
in " 'niultispinata." 
Fig. 21. — Side view of a shell in a very youthful state. Bradford Abbas. 
My Collection. 
Fig. 22. — Back view. 
