254 DiCTYOSPONGIDiK 



PLATE XXVIII. 

 HYPHANT^NIA, Vanuxem. 



Page 137. 

 (See Plates XXIX and XLV.) 



HypHANT^NiA CuEMUNGENSis, Vanuxem. 



Page 139. 

 (Sea Plates XXIX and XLV.) 



Figure 1. An internal cast of the central or basal portion of a frond, showing 



the concentric and radiating ligulate bands and the open quadrate 



interspaces. 

 Figure 2. A view of the original specimen described and figured by 



Vanuxem. This shows the strongly elevated margins of the radial 



bands which are maintained at the intersections of these with the 



concentric bands. 



Chemung group. In tlie vicinity of Owego, Tioga county, Ntw 



York 



