CLATHRARIA LYELLII. 



297 



GN. IS. CLATHRARIA LYELLII; 



From the Chalk-marl at Bench urch, Isle of Wight; discovered by 

 Captain Ibeetson. 



This fossil is the summit of a stem garnished with petioles or leaf- 

 stalks on the upper part : from the lower portion the petioles have been 

 removed. The internal axis is seen at a. The original is fifteen inches 

 in length; and eleven and a half in the widest transverse diameter. 



