142 



NEW YORK STATE MUSEUM 



hexagonal, not rounded and varying in size according to age of 

 individual; septal spines in one or more rows. 



*££&. 



Fig. 36 Favosltes pyrlformis 



Found in the Rochester shale and Lockport limestone at Lock- 

 port (Hall). Probably occurs also at Niagara. 



_^ Favosites constrictus (Hall) (Fig. 37). As- 



tro c e r i u m c o n s t r i c t u m Hall (1852. 

 Pal. N. Y. 2:123, pi. 34A) 



Distinguishing characters. Small size; 

 hemispheric form; minute corallites which 

 appear constricted at intervals; calyxes ap- 

 pear stellate. 



Found in the Rochester shale at Lock- 

 port and other places (Hall). Probably also at Niagara. 



Favosites niagarensis Hall (Fig. 38) (1852. Pal. N. Y. 2:125,. 

 pi. 34A) 



Distinguishing characters. Spheroidal to irregular form, rapidly 

 increasing in size by interstitial addition of corallites; thin walled 

 corallites with mural pores in double rows; tabulae often oblique 

 or bent downward; calyxes varying in size with varying age of in- 

 dividual; septal spines obsolete. 



Found in the Lockport limestone at Niagara and Lockport. 



* r ~ f 



Fig. 37 Favosites constrictus; 

 a group of corallites enlarged, 

 and enlargements of the 

 calyxes 



