ANTHOZOA—TETRACORALLA. 



61 



VII. Pycnostylus Whiteaves. 

 Corallum of cylindrical tubes increasing by calicular budding of 

 three or four branches at distant intervals. Septa in form of short 

 vertical ridges, tabulae well developed, horizontal. Siluric. 









FlG. 90. Blolhrophyl- 

 lum promissum. Sec- 

 tioned (Ind. Geol. Sur- 

 vey). 



Fig. 91. Pycnostylus 

 guelphensis with 2 buds sec- 

 tioned (Lambe). 



m 



Fig. 89. Blothrophyllum 

 promiss?tm (Ind. Geol. Sur- Fig. 92. Chonophyllum niagarense (N. Y. Geol. 

 vey). Survey). 



