SUPPLEMENT, PLATE XVIII. 



Discitse hemera. 

 Figs. 1 — 3. — Toxolioceras Walkeri, S. Buckman. 

 Fig. 1. — Side view. Bradford Abbas, " Fossil Bed." (Page cxxvi.) 

 (See Fig. 22, and also PI. XVI, figs. 1, 2, " Hyperlioceras Walkeri.") 

 Fig. 2. — Whorl-section. 

 Fig.«3. — Kadial curve. 



Figs. 4 — 6. — Toxolioceras mundum, 8. Buckman. 



Fig. 4. — Side view. Bradford Abbas, " Fossil Bed." My father's Collection. (Page cxxvi.) 



Fig. 5. — Front view. 



Fig. 6. — Badial curve. 



Figs. 7 — 9. — Hyperlioceras ihscitiforme, S. Buckman. 



Fig. 7.— Side view. Bradford Abbas, " Fossil Bed." Collection of Mr. Darell Stephens, F.G.S. 

 (Page cxxiv.) 



Fig. 8. — Whorl-section. 



Fig. 9. — Radial curve. 



Figs. 10 — 12. — Stokeia subacuta, 8. Buckman. 



Fig. 10. — Side view (portion). Locality not recorded. Matrix like Halfway Bouse (near 

 Sherborne, Dorset) " Blue Beds." My father's Collection. (Page cxxviii.) 



Fig. 11. — Whorl-section. 



Fig. 12. — Badial curve. 



Figs. 13 — 15. — Darellia toxeres, 8. Buckman. 



Fig. 13. — Side view. Stoke Knap (Dorset), "Building Stone." (Page cxiii.) 



Fig. 14. — Front view (outline). 



Fig. 15. — Eadial curve. 



Figs. 16 — 18. — Darellia concinna, S. Buckman. 



Fig. 16. — Side view (portion). Locality not recorded, presumably Bradford Abbas, " Fossil 

 Bed." My father's collection. (Page cxiv.) 



Fig. 17. — Whorl-section. 



Fig. 18. — Eadial curve. 



Figs. 19—21. — Hugia curva, S. Buckman. 



Fig. 19. — Side view. Bradford Abbas, " Fossil Bed." (Page cxi.) 



Fig. 20. — Front view (outline). 



Fig. 21. — Suture-line. 21 a. Badial curves. 



Figs. 22 — 31. — Radial Curves. 



Fig. 22.— Toxolioceras Walkeri, PI. XVI, figs. 1, 2. (Page cxxvi.) 



Fig. 23.— Hyperlioceras discitiforme, PI. XVI, tigs. 12, 13. (Page cxxiv.) 



Fig. 24i.—Bei/nesella piodes, PI. XVI, figs. 7, 8. (Page cix.) 



Fig. 25. — Beynesella piodes, PI. XVI, fig. 9. (Page cix.) 



Fig. 26.— Beynesia ccela, PI. XVI, figs. 10, 11. (Page civ.) 



Fig. 27. — Beynesia intermedia, PI. XI, figs. 2, 3. (Page ciii.) 



Fig. 28. — Beynesia laxa, PI. XI, figs. 6, 7. Drawn with curves rather too pronounced. 

 (Page ciii.) 



Fig. 29. — Beynesia lepida, PL XI, figs. 4, 5. (Page civ.) 



Fig. 30. — Darellia semicostata, PI. XII, figs. 10, 11. (Page cxiii.) 



Fig. 31.— Darellia? polita, PI. XVI, figs. 3, 4. (Page cxiv.) 



