ANTHOZOA—TETRACORALLA. 



63 



25. C. vesiculosum Goldfuss (= C. americanum E. & H.). 



(Fig. 93.) Devonic. 



Large, cylindrical, frequently constricted, covered by a thin but 



strongly wrinkled epitheca. Calyx with a faint simulation of 



septa. Vesicular tissue coarsest near the center. 



Fig. 94. Cystiphyllum conifollis (Pal. 

 N. Y.). 



Fig. 93. Cystiphyllum vesiculosum. 



Fig. 95. Cystiphyllum varians (Pal. 



N. Y.). 



Abundant in the Onondaga and Hamilton strata of New York, 

 Canada and Michigan, Ohio, etc., also at the Falls of the Ohio. 



26. C. conifollis Hall. (Fig. 94.) Devonic. 



Slender, cylindrical, with periodic constrictions. Cysts arranged 

 radially at the base of the calyx. 



Common in the Hamilton group of New York, Canada, etc. 



