396 



Repokt of the State Geologist. 



PLATE L. 



THAMJSTODICTYA, Hall. 



Page 352. 

 (See Plates LII and LIU.) 



Thamnodictya Newberryi, Hall. 



Page 353. 

 (See Plate LII.) 



Figure 1. An entire frond showing its broad vase-shaped expansion and 

 coarsely reticulate surface. This specimen is largely an internal cast 

 in soft shale but retains the features of the exterior. 



Figures 2, 3. Opposite sides of an internal cast of a small frond which has 

 been ruptured along one side, but preserves a portion of the 

 apertural margin and shows the disappearance of the coarse spicular 

 bands, and the predominance of the finer net-work in this region. 



Figure 4. An enlargement of a portion of the surface of an internal cast. 



Figure 5. An internal cast of the expanded portion of a specimen. 



Figure 6. An enlargement of a portion of the surface shown in fig. 1. 

 Waverly group. Cuyahoga Fall*, Ohio. 



CALATHOSPONGIA, gen. nov. 



Page 347. 



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



Calathospongia (?) SACCULUS, Hall (sp.). 



Page 352. 



Figure 7. A view of the specimen, showing its short subcylindrical, unex- 

 pended form and the character of its reticulation. 

 Waverly group. Richfield, Ohio. 



CLATTIPOSPONGIA, Hall. 



Page 861, part 1. 

 (See Plates XIV, XV, XVIII, XXI, XXV, XLIX.) 



Clatiirospoxgia caprodonta, sp. nov. 



Page 346. 



Figures 8, 9. Opposite sides of an essentially complete internal cast, which 

 represents a long slender cup with a snbprisinatic surface and traces 

 of low nodes at the angles of large quadrilles. Only the coarsn 

 reticulation of the skeleton is apparent. 

 Waverly group. Portsmouth, Ohio. 



