FLUSTRA. 255 
a work on fresh-water zoophytes. I did so; and I had a 
very friendly letter from him, saying that it was very in- 
teresting, but that he would like to examine it in a living 
state before giving his opinion respecting it. In a letter 
which I lately had from Mr. Wigham, he mentions that he 
had shown it to Mr. Peach, who said it greatly resembled 
Membranipora Peachii, which he had found in the dock at 
Ipswich; but yet it seemed distinct; as the one found at 
Ipswich had three inflected spines on each cell, whereas the 
Yarmouth one was invariably without spines. 
Corresponding lately with Mr. Busk, of Greenwich, I 
sent him a specimen of the Yarmouth zoophyte, and he 
wrote to me that it seemed to be Mwustra distans of Mr. 
Hassall, of which he had a specimen named by our lamented 
friend Mr. W. Thompson. I have not at hand the volume 
of the ‘Annals of Natural History,’ in which it is figured 
and described by Mr. Hassall. 
12. Frusrra uisprpa, Rough Sea-mat. 
Hab. In irregularly-shaped patches on Fucus serratus ; 
common. 
This, ike many other common things, possesses uncom- 
mon beauty, but as this beauty must be “sought out,” not 
one in ten thousand ever sees anything remarkable in it. I 
