PLATE VIII. 



Sowerbyi-zone (Concavum-beds) . 

 Lioceeas concavum (Soioerby). 



Fig. 1. — Side view of a typical adult specimen with greater portion of the test 

 well preserved. The cross shows the last suture-line. Bradford Abbas, Dorset. 

 Collected by my father. (Page 56.) 



Fig. 2. — Front view of the same, showing acutely sloped ventral area. 



Fig. 3. — A finer ribbed specimen, at an earlier age. Side view. Entire test 

 most perfect. Bradford Abbas, Dorset. My Collection. 



Fig. 4. — Front view of the same. 



Fig. 5. — A very peculiar variety, with extremely fine striae, and small deep 

 umbilicus. All the test present, and the mouth-border. Bradford Abbas, Dorset. 

 My Collection. 



Fig. 6. — Outline of the ventral area, and the body-chamber of the same 

 specimen, to show small amount of carina. 



Fig. 7. — Another peculiar variety, with indications of small knobs on the 

 lateral area. All the test preserved. Very straight mouth-border. Bradford 

 Abbas, Dorset. My Collection. 



Fig. 8. — Outline of the ventral area of the body-chamber of the same specimen, 

 showing that it is more acute, and has more carina than in Fiar. G. 



