284  DiCTVOSPONOIDiE. 



PLATE XLIII. 

 CEKATODICTYA, gen. nov. 



Page 117. 

 (See Plates XXU, XLI, XLII.) 



Cebatodictya Carpenteeiana, sp. nov. 



Page 117. 

 (See Plate XLII.) 



Figure 1. A large fragment of this species, complete at neither extremity. 

 This drawing has been made from several pieces of the same individ- 

 ual and as -these did not perfectly fit, the figure does not represent 

 the entire length of the fragment. The specimen shows the very 

 gradual expansion of the sj)onge, indicating that it must have 

 attained great length at full growth. 



Figure 2. Another fragment preserving the apical portion entire and showing 

 the gradual change with growth in the aspect of the annulations. 

 Chemung group. Near Ischua, JVew York. 



Figure 8. A very imperfect fragment from near the aperture of a full groAvn 

 specimen. This specimen indicates the great length which the 

 species must have attained and shows the ultimate modification in 

 the form of the annulations which are here brought so close together 

 that their duplicate character is obscured. 

 Chemung group. Randolph, New Yorh. 



