226 NEW YORK STATE MUSEUM 



PLATE ii 



(Original in the state museum) 

 Amnigenia catskillensis Vanuxem sp. 



A slab of sandstone bearing 33 individuals of this species all 

 with closed valve® and buried in the mud at various angles 

 across the lines of sedimentation. Keduced \ 



Oneonta sandstone. Oxford N. Y. 



