356 II. 3f. Seely — A new genus of Chazy Sponges. 



named Calciferous fossil, Cryptozoon proliferum, figured and 

 described by Professor James Hall, Thirty-sixth Report of the 

 Regents of the New York State University, helps to determine 

 the relationship. A portion of that description reads : " The 

 substance between the concentric lines, in well-preserved speci- 

 mens, is traversed by numerous minute irregular canaliculi 

 which branch and anastomose without regularity. " 



Description of Figures. 



1 . Strephocheius ocellatus in rock, natural size. 



2. The canaliculated structure of the fossil, enlarged one hundred diameters. 



3. The same — view from near the center of the field, enlarged about three 

 hundred and fifty diameters. 



The sections made, and those viewed from the cuttings of 

 others from what is supposed to be this Cryptozoon, do not show 

 the described structure plainly enough to permit me to make 

 satisfactory comparison with the Chazy form. The structure 

 is possibly identical. The little canals which bo largely make 



