BRITISH FOSSILS. 



3 



stellate tubercles, each* of which is supported on a circular, smooth 

 base or pedestal. I have named it Aster acanthus papillosus. 



Locality. — The only specimen I have seen of this species is one 

 from Swanage, presented to the Dorchester Museum by Mr. Williams, 

 and liberally placed at my disposal, for description, by that in- 

 stitution. 



Explanation of Plate. 



Fig. 1. Asteracanthus semiverrucosus, size of nature. 

 Fig. 2. Tubercle, magnified. 



P. DE M. Grey Egerton. 



May 1853. 



