PLATE X. 



Fatosites epidekmata var. corticosa. 



Faimsifes epiih'riniita Rominger, in part. 



Fig. 1. View of a large specimen which is broadly turbinate at the base and divides into several 

 branches above, tlie whole covered by the characteristic epitheca. 



Fig. 2. A weathered section, cutting obliquely across the upper part of a broad cyathiform speci- 

 men, showing the transverse diaphragms. 



Fig. 3. View of the opposite side of the same, showing the peculiar epitheca very strongly marked. 



Fig. 4. View of a narrowly turbinate bud or branch, which is sulcated along the middle, showing 

 a tendency to division. 



Fig. 5. A longitudin.il section from the specimen fig. 4, showing a small form of the cell with 

 closely arranged diaphragms. 



Fig. 6. An enlargement of several open cells of a large celled vanety of this species, showing the 

 incomplete diaphragms and mural pores. 



Favosites hemispherica. 



{For references, see Explatiation of Plule 2.) 

 Fig. 7. Au enlargement of a part of a specimen with open cells, showing the characteristic single 

 range of pores. The transverse diaphragms have been removed in the process of 

 silicification. 



