io6 



OUR COMMON BRITISH FOSSILS. 



formerly known as Annuloida, or " ring-like" animals. 

 All are internally related (although their external 



Fig. 88. — Etcryale pahnifera, showing at /;, disk and part of arm (front view) ; 

 c, ditto (back view) ; d, extremities of arms. 



shapes may be different) by the possession of a peculiar 



