PLATE XX. 



Concavum-beds. 

 Figs. 1, 2. — Hypeelioceeas subdiscoideum, S. Buckman. 



Fig. 1. — Side view of a large specimen with only a thin film of test preserved. 

 Only a portion of the specimen has been drawn. Railway cutting, Bradford 

 Abbas, Dorset. My Collection. (Page 100.) 



Fig. 2. — Outline of the front view. The carina at the top with the test entire, 

 at bottom and point of re-entry without test. 



Variabilis-subzone. 



FigS. 3 6. PSEUDOLIOCEEAS COMPACTILE {SlmpSOll). 



Fig. 3. — Side view of a specimen with test completely preserved. Bed 17, 

 Coaley Wood, Gloucestershire. My Collection. (Page 85.) 



Fig. 4. — Front view of the same specimen. The hollow carina is filled with 

 crystal, but the aperture with sandy stone. 



Fig. 5. — Side view of a young specimen with quite half a whorl of body- 

 chamber present. The carina is solid upon the body-chamber. a, indicates 

 carina with test ; b, without. North Nibley, Gloucestershire. My Collection. 



Fig. 6. — Back view of the same specimen showing broader, flattened, ventral 

 area of body-chamber, a, ventral area and carina with test ; b, without. 



Opaliniim-zone . 

 Figs. 7 — 9. — Psjecdolioceeas Beyeiohj (ScMoenbach) variety. 



Fig. 7. — Side view of a specimen with the inner coat of the test well preserved. 

 No part of the body-chamber present. Coaley Wood. My Collection. (Page 87.) 



Fig. 8. — Front view of the same specimen, a, ventral area and carina, test 

 present ; b, rounded ventral area without carina, test absent. 



Fig. 9. — Side view of a variety with larger umbilicus. North Nibley. My 

 Collection. 



Fig. 10. — Outline of the back view of the same specimen, a, ventral area and 

 carina with test present ; b, rounded ventral area without test. 



Figs. 11, 12. — Ludwigia costosa (Quenstedt). 



Fig. 11. — Side view showing the bifurcate reflexed ribs. Burton Bradstock, 

 Dorset. My Collection. (Page 102.) 



Fig. 12. —Front view of the same specimen. 



Parkinsoni-zone. 



Figs. 13 — 17. — (Ecotraustes conjungens {K. Mayer). 



(Inserted here by mistake.) 



Fig. 13. — Side view of a specimen with test preserved. About half of the 

 body-chamber is probably present according to the knobs. Bradford Abbas, 

 Dorset (Bed No. 1). My Collection. 



Fig. 14. — Back view of the same specimen showing the tubercles on each side 

 of a small keel. (The figure is drawn too long.) 



Fig. 15. — Side view of a specimen without test. The whole of the body- 

 chamber is present. The cross marks the position of the last suture. Bradford 

 Abbas, Dorset. Collected by my father. 



Fig. 1G. — Front view of the same specimen, showing the rounded ventral area 

 at the end of the body-chamber. 



Fig. 17. — The mouth border, showing part of the lateral process, from another 

 specimen. Bradford Abbas. My Collection. 



