28 THE CRETACEOUS BOCKS OF BRITAIN, 
Ua 
Lower Chalk Fossils. 
Fig 14— Holaster subglobosus, LesJce (nat. size). 14a, apical view 
146, side view. 
15— Discoidea cylindrica, Lam. (large specimen, nat, size). 
16— Holaster trecensis, Leym. (nat. size, apical view). 
17— Jnoceramus latus, cVOrb. non Mant. (two-thirds of nat. size). 
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