66 MOLLUSCA OF SOMERSET. 
MARINE. 
NUCULIDZ. 
NucuLa NUCLEUS, Linné. 
Weston and Burnham. Frequent ! 
Clevedon; J. W. Cundall. 
ANOMIID£. 
ANOMIA EPHIPPIUM, Linné. 
A variable species. ‘In consequence of the lower valve 
being moulded on the extraneous bodies to which it is attached 
by the plug, the upper valve partakes of a corresponding im- 
pression, and the result is that the shell puts on a Protean 
variety of shape. Bouchard-Chautereaux says that out of 
two hundred specimens it is almost impossible to find two ex- 
actly alike. When a specimen is affixed to a Pecten, Astarte, 
or other ribbed shell, it is similarly sculptured. No less than 
thirty-four species have been made out of the one now des- 
cribed ; and naturalists of every country have had a hand in 
this wholesale manufacture”; Gwyn Jeffreys. 
Weston, Burnham, Minehead ! 
ARCID&. 
GLYCYMERIS GLYCYMERIS, Linné (=Pectunculus glycymeris, 
Linné ). 
The “ Dog-cockle” of Da Costa. A gregarious species, 
eenerally diffused on sandy shores ; not common on the Somer- 
set coast. 
Between Brean and Burnham ! 
MYTILIDZ. 
MYTILUS EDULIS, Linné. 
The common mussel. A favourite article of food in this 
and many other maritime countries. Frequent in the raised 
beaches and in the Burtle deposits. Mr. H. Corder reports its 
occurrence in the Burtle Beds at Perry Green, Wembdon. 
About Weston-super-Mare and Burnham ! 
