SUPPLEMENT, PLATE IV. 



Variabilis hem era. 



Figs. 1 — 3. — Denckmannia ? malagma (Dumortier). 



Fig. 1. — Portion of the side view of an example from the so-called "Upper 

 Lias," Shepton Beauchamp, Somerset. My Collection. (Page xx.) 

 Fig 1 . 2. — Outline of the whorl-section. 

 Fig. 3. — Radial curve. 



Figs. 4 — 6. — Denckmannia? obtecta, 8. Buchman. 



Fig. 4. — Portion of the side view of a specimen from Cotteswold Sands, Coaley 

 Wood (Bed 16, section vi, p. 45). My Collection. (Page xxi.) 

 Fig. 5. — Outline of the whorl- section. 

 Fig. 6. — Radial curve. 



Figs. 7 — 9. — Brodieia juncta, 8. Bud-man. 



Fig. 7. — Side view. From so-called " Upper Lias," Barrington, Somerset. 

 My Collection. (Page xxxii.) 



Fig. 8. — Outline of the whorl-section. 



Fig. 9. — Parts of suture lines. 9 a. — Radial curve. 



Murchisonse or Bradfordensis hemera. 



Figs. 10 — 12. — Cosmogyria obtusa (Quenstedt). 



Fig. 10. — Side view. Dundry, Somerset. Collected by the late Mr. E. Wilson, 

 F.G.S., to whom I am indebted for its addition to my cabinet. (Page liii.) 

 Fig. 11. — Outline of the whorl-section. 

 Figs. 12, 12 a. — Suture lines. 12 b, c, d. — Radial lines. 



Bradfordensis hemera. 



Figs. 13 — 15. — Cosmogyria subtabulata, 8. Buchman. 



Fig. 13. — Side view. Quarry Hill, Chideock, Dorset; from the "red beds." 

 My Collection. (Page liii.) 



Fig. 14. — Peripheral view (outline). 11 a. — Outline of whorl-section. 

 Figs. 15, 15 a. — Suture lines. 15 b. — Radial line. 



Figs. 16 — 18. — Welschia rustica, S. Buchman. 



Fig. 16. — Side view. Stoke Knap, Dorset ; from the " Building Stone." My 

 Collection. (Page lii.) 



Fig. 17. — Outline of whorl-section. 

 Fig. 18. — Radial line. 



Murchisonse, hemera. 



Fig. 19. — Welschia obtusiformis, 8. Buchman. 



Fig. 19. — Radial line of the specimen figured in Plate I as Ludwigia Murchi- 

 sonse, which should now be altered. (Page lii.) 



