PLATE IV. 



Sowerbyi-zone. 

 Figs. 1 — 4. — Ludwigia cornu, 8. Buckman. 



Fig. 1. — Side view of a specimen with open umbilicus, showing lateral lappet. 

 Natural size. My Collection. Near Halfway House (Sherborne), Dorset. (Page 20.) 



Fig. 2. — Front view of the same, to show section. 



Fig. 3. — Side view of a specimen with small umbilicus, showing the termination. 

 Natural size. My Collection. Bradford Abbas, Dorset. (Page 20.) 



Fig. 4. — Back view of ditto, showing the prominent keel. 



Mu rch isonce-zone. 



Figs. 5 — 8. — Lioceras bradfordense, 8. Buckman. 



Fig. 5. — Side view of a specimen about half-grown, showing a regularly coiling 

 centre and termination to body-chamber. Natural size. My Collection. Bradford 

 Abbas, Dorset. (Page 22.) 



Fig. 6. — Front view of ditto. 



Fig. 7. — Side view of young shell. Natural size. My Collection. Halfway 

 House, Dorset. (Page 22.) 



Fig. 8. — Suture lines as shown by the specimen figured on the next plate. 

 (Page 24.) 



