EXPLANATION OF PLATE XXXVII. 



Diphyphyllum gemriiiformis, Eth. fil. 



Fig. 1. The corallum exhibiting sub-compound and single corailites, seen 

 from above. 



8yringoj)ora spelceanus, Eth. fil. 

 ,, 2. Corailites seen protruding from a mass of limestone. 



