294 DlCTY08HONOID-<E. 



PLATE XLVIII. 

 CALATHOSPONGIA, gen. no^^ 



Page 155. 

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



Calatiiospongia Redfieldi, Hall (sp.). 



Page lo5. 

 (See Plate XLIX.) 



Figures 1, 2. Opposite sides of a fine, large, nearly entire sponge, with the 

 aperture complete on one side. Tlie median swelling of this 

 cup seems to be due to distortion from vertical compression, and 

 the base, though not actually retained was probably not greatly 

 different from the present condition of the lower extremity. The 

 specimen shows the characteristic surface features with great clear- 

 ness, and over the apertural region as well as upon the swollen por- 

 tion of the cup in fig. 2 may be seen obscure traces of the prismatic 

 faces. 

 Waverly group. Akron, Ohio, 



