318 THE INHABITANTS OF THE SEA. 
common stock or polyzoary is unbroken, and opening on both 
surfaces, while in the Retepores we find the cells opening only 
on one side, and the leaf-like expansion pierced like network, 
Eschara cervicornis. 
(Natural size.) Eschara cervicornis, magnified twenty 
diameters, to show the form and ar- 
rangement of cells. 
In cabinets of natural history, the species commonly called 
Neptune’s ruffles will rarely be found wanting. It is a native 
of the Mediterranean, but individuals of a smaller size are also 
found in the British seas. 
An individual of Eschara cervicornis, Retepora cellulosa. 
highly magnified. (Neptune’s Ruffle.) 
a. Tentacula. 6. First digestive cavity. 
d. Stomach. J. Anus. 
The Lepraliz, or Sea-Scurfs, form thin calcareous crusts of 
a white-yellow or reddish colour on rocks, shells, and sea- 
weeds. To the naked eye they avpear as rude unsightly 
eal 
