POLYZOA. 265 
_ then residing at Lamlash, it was shown to him, who kindly 
took a drawing of it and sent it to Dr. Johnston, who has 
given it a place in his ‘ History,’ as fig. 86, p. 476. Soon 
after, Mr. Alder discovered that it had been figured and 
described by Sars, in his ‘ Fauna of Norway,’ as Lucernaria 
cyathiformis. Its form greatly resembles some of our old 
silver communion-cups, with a fringe round its mouth. In 
its structure and substance it is like the other Lwcernaria. 
“The tentacles are arranged in eight tufts round the in- 
terior of the disc; and they are extended beyond it, when 
the animal is alive.” It would appear that it is not very 
rare in the island of Arran, for I got it afterwards on the 
east side of the island, in a rock-pool at Corrigils. 
Crass II. POLYZOA. 
The Polyzoa are divisible into two orders :— 
I. Iyrunprpunata. Natives of the sea. Polypes com- 
pound; the mouth surrounded with ciliated filiform re- 
tractile tentacula, which form an uninterrupted circle : 
ova ciliated. 
