400 



Report of the State Geologist. 



PLATE LII. 



THAMNODICTYA, Hall. 



Page 352. 

 (See Plates L and LIII.) 



Thamnodictya Newberryi, Hall. 



Page 353. 

 (See Plate L.) 



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

 portion being bent down and flattened. 

 Waverly group. Rich field, Ohio. 



CALATHOSPONGIA, gen. nov. 



Page 347. 



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



Calathospongia carceralis, sp. nov. 



Page 349. 

 (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. liich field, Ohio. 



Calathospongia Carlli, sp. nov. 



Page 350. 



Figures 4, 5. 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. Near PleasantviUe, Venango county, Pennsylvania. 



