PLATE XL 



Metopasteu Parkinsoni, Forbes, sp. (Page 31.) 



From the Ujjper Chalk. 

 Fig. 

 Iff. Abactinal aspect ; natural size. (Coll. Brit. Mus.) 



h. A supero-marginal plate ; magnified 3 diameters. 



r. The madreporiform body ; magnified G diameters. 

 2 u. Abactinal aspect of another example ; natural size. (Coll. Brit. Mus.) 



h. A supero-marginal plate ; magnified. 



c. An abactinal intermediate plate ; magnified. 



Metopasteu uncatus, Forbes, sp. (Page 47.) 



From, the U])per Chalk. 



3 a. Actinal aspect of a specimen from which the whole actinal floor has been 

 removed, showing the inner surface of the abactinal floor ; natural size. 

 (Coll. Brit. Mus.) 

 b. Abactinal intermediate plates, inner surface ; magnified. 



