20G DlCTYOSPONOID^. 



FLITE XXXIV. 

 CLEPSYDROSPONGIA, gen. nor. 



Page 71. 



Cl^PSTDROSPONGIA MATUITNA, Sp. nOV. 

 Pago 71. 



Figures 1, 2. Opposite sides of the original specimen ; showing the subequal 

 expansion of the extremities and the contracted median nodose area. 

 Figure 1 is drawn from the specimen as it lies in its matrix and 

 shows the node-tufts even at spots where no nodes are clearly 

 developed on the surface. 

 Portage group. Naples, New Yo^'K 



PRISMODICTYA, gen. nov. 



Pago 79. 

 (See Plates XVII, XVIII, XIX, XX, XXI, XXVH, XXXIII, XXXV, XXXVI, XLI, XLII, LV.) 



Pkismodictya ptionia, sp. nov. 



Page 88. 



Figure 8. The original specimen showing its great expansion near the middle 

 and its concave prism-faces. 

 Chemung group. Scio, Neio Yorh. 



Pkismodictya aulopiiia, sp. nov. 



Page 88. 

 (See Plates XX and XLI ) 



Figures 4, 5. Two specimens ; showing the elongate form and concave faces. 

 These specimens are from a fragment of rock which contains traces 

 of niimerous other individuals of this species. 

 Chemung group. Scio, New Yofk. 



