334 DiCI YOSPONOin.E. 



PLATE LXVIII. 

 PIIRAGMODICTYA, Hall. 



Page 172. 

 (See Plates LXIV, LXV, LXVI, LXVII.) 



PlIBAGMODICTYA CATILLIFOBMIS, Whitfield (sp.). 



Page 173. 



(See Plates LXIV, LXV, LXVI, LXVII.) 



Figure 1. An average individual retaining the skeleton from the basal disc 

 n]n\'ard and preserving the usual configuration of the surface. 



Figure 2. A small specimen, exposing the basal disc and part of the periloph. 



Figure 3. A portion of a moderately large example showing the disc and the 

 strong vertical surface ridges. 



Figure 4. The concave or lower surface of the basal disc with the broad 

 periloph attached. 

 Keokuk group. Crawfordsville, Indiana. 



(?) Phkagmodictya lineata, Hall. 



Page 176. 



Figure 5. The original specimen, which is a fragment of a smooth, slender 

 subcylindrical cuj), somewhat expanded about the lower end. It is 

 probably not a species of Phragmodictya. 

 Keokuk group. Grmjofordsville, Indiana. 



CALATIIOSPONGIA, gen. nov. 



Page 155. 

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



Calathosponqia amphorina, sp. nov. 



Page 182. 



Figure 6. A specimen with the flaring upper portion somewhat deflected but 

 showing the general aspect of the sponge. The surface is smooth 

 and the reticulum fine -with prominent vertical spicular bundles. 

 Keokuk group. Craicfui-dsvlUe, Indiana. 



