.JQ2 DicTYospoNoinie. 



PLATE LII. 

 THAMNODICTYA, HalL 



Page 160. 

 (See PUtei Land LIU.) 



Thamnodictya Newbebryj, Hall. 



Page 161. 

 (See Plats L.) 



Figure 1. The upper vase-shaped part of a large iudividual, the apertural 

 portion being bent down and flattened. 

 Waverly group. JRiehfield, Ohio. 



CALATHOSPONGIA, gen. nov. 



Page 155. 

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



Calathospongia carcekalis, sp. nov. 



Page 157. 

 (See Plates LI and LX.) 



Figure 2. An essentially entire example with well developed prism-faces. 

 Figure 3. A small individual with obscure prismatic division. 

 Waverly group. Richfield, Ohio. 



Calathospongia Caklli, sp. nov. 



Page 158. 



Figures 4, 6. Two views of a nearly entire but somewhat distorted specimen, 

 showing the narrow basal part and wide apertural expansion. 



Figures 6, 7. Opposite sides of a small example, essentially entire at both 

 extremities. 

 Waverly group. Nea/r Pleasantville, Venango county, Pennsylvania. 



