20 



ECHINODERMS OF THE CRAG. 



3. CoMATULA Ransomi. {See Woodcut below.) 



A number of cups of a third species of Comatula have been found by Mr. Searles 

 Wood, in the Coralline Crag of Sutton. It probably bore a nearer resemblance to our 

 existing British forms of this genus than any of its fossil allies. 



The largest of these disks measures one twelfth of an inch in diameter by rather more 

 than one milleraetrc in height. The excavation occupies more than a half of the total 

 width, rendering the marginal sulcated portion very narrow. The under surface is conic 

 and reversely cup-shaped, depressed at the base, and marked by the sockets of numerous 

 feelers, which were ranged in about three rows on the sides, the largest circle of about 

 fifteen pits. 



