gj^ DlCTYOSPONGID^E. 



PLATE LVIII. 

 LEBEDICTYA, gen. nov. 



Page 169. 

 (Se« Plates LIX and LXI.) 



Lebedictya crinita, sp. nov. 



Page 169. 

 (See Plates LIX .-ind LXI.) 



Figures 1, 2. Opposite sides of a specimen, probably representing most of 

 tlie sponge, retaining the aperture complete and shoAving its mar- 

 ginal fringe of long spicules. The cup has an essentially smooth, 

 gently expanding, slightly prismatic surface ; the face exposed in fig. 2 

 showing the finer net-work and the uneven growth of the reticulum 

 at the margin, while the surface represented in fig. 1 shows traces of 

 the erect outer spicular lamellae which form coarse quadrules, and at 

 the right, where exfoliated, a large internal bundle of vertical 

 spicules. 

 Keokuk group. Crawfordsville, Indiana. 



