PLATE 37 A. 



Fig. 1. 523. 1. Stromatopora concentrica. ( P^g- 136.) 



The base of a large individual of this species. 



Fig. 2. 567. 1. LicHENALiA coNCENTBicA. (Pas'' 171.) 



la. A nearly perfect fioud. 2 b. An enlargement of the surface of the same. 



