196 SPATANGACEvE. 



and in Ireland, Mr. Ball, who observes that it is rose- 

 eolonred when alive, has taken it at Dublin and at Youghal. 

 It occurs also near Belfast. In England, Mr. Couch says 

 it is found in Cornwall, less common than the last ; and I 

 have taken it in deep water on the Manx coast. 



The vignette represents its Pedicellariee, and one of its 

 oral tentacula. The former have deep purple heads and 

 white stalks, and are very irregularly scattered in the 

 spaces between the two dorsal avenues. The latter are 

 yellow, and resemble those of Spatangus purpureus, saving 

 that the Purple Heart-Urchin has brown oral tentacula. 



