PLATE XIV. 



Opalinum-zone. 

 Figs. 1 — 6 (1 and 2 r). — Lioceras opalinum, var. comptum (Reinecke). 



Fig. 1. — Side view of a thick, small-centred specimen with some characters of 

 both Lioc. opalinum and comptum, but differing from either of them. Burton 

 Bradstock. My Collection. (Page 55). 



Fig. 2. — Front view, showing its thickness and prominent carina. 



Fig. 3. — Side view of a true form with part of test extremely well preserved. 

 Burton Bradstock. My Collection. (Page 55.) 



Fig. 4. — •Front view of the same specimen. 



Fig. 5. — Side view of a more widely centred variety. Haresfield Hill. My 

 Collection. (Page 54.) 



Fig. 6. — Front view of the same specimen. 



Figs. 7 — 9. — Lioceras, sp. ? 



Fig. 7. — Side view of a specimen with well-preserved test, showing a change 

 from strias to coarser ribs. Haresfield Beacon. My Collection. (Page 53.) 



Fig. 8. — Front view of the same specimen, the inner margin is drawn some- 

 what too much sloped. 



Fig. 9. — (To supplement fig. 8, which is broken.) Taken from a little further 

 back to show the ventral area and carina accurately in section. 



Soiverbyi-zone (Concavum-beds) . 

 Figs. 10, 11. — Lioceras fallax, S. Buckman. 



Fig. 10. — Side view of a large specimen, with greater portion of the test 

 present, showing the umbilicus, with portions of the inner whorls exposed. Brad- 

 ford Abbas, Dorset. Collected by my father. 



Fig. 11. — Front view of the same specimen, showing the ventral area and 

 carina, both with and without test. 



