39-4 



Report of the State Geologist. 



PLATE XLIX. 



CALATHOSPONGIA, gen. nov. 



Page 347. 



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



Calatiiospo^gia Redfieldi, Hall (sp.). 



Page 347. 

 (See Plate XLVIII.) 



Figure 1. A fragment of a small specimen 

 Waverly group. Michfield, Ohio. 



Figures 2, 3. The opposite sides of a specimen which is virtually entire, the 

 apertural portion having been distorted by the vertical compression 

 and rupture of the reticulum. The surface of this specimen has been 

 somewhat abraded on the side shown in fig. 2, and the primary 

 transverse bands of the reticulum are not as clearly displayed as in 

 the example represented on the preceding plate. In fig. 3, the finer 

 superficial net-work is predominant. 



Figure -4. An enlargmeut of the surface from the same specimen, taken from 

 near the top of the side shown in fig. 3. These figures are from the 

 type-specimen of the species. 

 Waverly group. Harrisville, Ohio. 



CLATHROSPONGIA, Hall. 



Page 861, part 1. 

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



Clatheospongia abacus, Hall. 



Page 345. 



Figure 5. A nearly complete individual which shows the obconical form of 

 the cup and the great development of the erect vertical and horizon- 

 tal spicular lamellae. 



Figure 6. A restoration of a segment of the surface showing the relative 

 development of the successive series of reticulating lamellae, which 

 produce a deep fenestration of the outer sponge- w all. 



Figure 7. A restoration showing only the primary vertical and horizontal 

 bands with the marks of subordinate lamellae upon their surface. 



Figure 8. An internal cast showing the aspect of the fossil when divested of 

 its exterior lamellae. 



Waverly group. Warren, JPennsyl/vania, 



