BRITISH SEA-ANEMONES. 
GENERAL DESCRIPTION 
AND EXPLANATION OF TERMS. 
As it is of great importance in scientific description to 
employ precise terms for the various parts of the objects 
described, and for the conditions of those parts, and to use 
the same terms always in the same sense, I here define the 
terms which I propose to use in this work. 
The principal parts of the body of a Sea- Anemone are 
the following : — the base ; the column ; the disk ; the 
tentacles ; the mouth ; the cavity. 
1. The Base (Basu). 
This is the lowest part of the animal, usually forming 
a flat area, by means of which it adheres to other bodies. 
It is often expanded {expama), its outline being consi- 
derably broader than a section of the column. In some 
cases, as in Edwardsia, it becomes very small, loses its 
function, and finally, as in Cerianthus, disappears. In 
Adamsia, it is greatly extended laterally into two wings, 
which, curving round, meet and unite by their edges, 
forming a complete circle. This form of base may be 
distinguished as annular [annularis). 
B 
