DlCTYOSPOXGID.E. 



409 



C AL ATHOSPONGI A , gen. nov. 



Page 347. 



(See Plates XLVIII, XLIX, L, LI, LII, LVII, LX, LXVIII.) 



CaLATHOSPONGIA (?) MAGNIFICA, Sp. llOV. 

 Page 374. 

 (See Plate LVII.) 



Figure 5. The expanded apertural portion of a large sponge showing sub- 

 prismatic faces. 



Keokuk group. Orawfordsville, Indiana. 



MASTODICTYA, gen nov. 



Page 359. 



Dictyospoxoia (Mastodictya) osculata, sp. nov. 



Page 359. 



Figure 6. A view of the specimen described; showing the conical pro- 

 longation at the left, terminating in an osculum, the imperfect 

 portion at the right probably representing a similar process. The 

 reticulum is very fine, its meshes being of uniform size. 

 Keokuk group. Cfra/wfordsviUe, Indiana. 



