36 



ECHIN0DERM8 OF THP] BRITISH ISLE8 



composed of very numerous short and wide joints ; the distal 

 part of these pinnules more or less serrate. 

 Only one species in British seas. 



Fig. 21. — Heliometra glaciaUs. Nat. size. 



1. Heliometra glacialis (Lesich). (Fig. 21.) 



(Syn. Antedon Eschrichtii Joh. Miiller, Heliometra Eschrichtii 

 (Joh. Miiller) ; Antedon quadrata P. H. Carpenter.) 



Cirri very numerous, about a hundred or more, covering 

 nearly the whole of the centro-dorsal ; they have mostly ca. 



