MR. H. E. HURRELL ON THE POLYZOA IN NORFOLK WATERS. 203 
There is no doubt in my mind that this is the Alcyonella 
fungosa of the older polyzooists, and the figure and description 
of Alcyonella in Allman’s monograph tallies very closely with 
my specimen. A thin section of the mass discloses other 
points of identity which I do not think need fear any further 
criticism. There is a handsome species found on the stumps 
of old reeds in the Great Ormesby Broad that closely resembles 
Allman’s Plumatella corallides, and is, no doubt, one and the 
same. I have noted many differences of growth and appear- 
ance in regard to this genus ; but having had to work at the 
subject practically without guidance, may have passed over 
new species, as I have gone upon the plan of placing a specimen 
with the species which it most nearly resembles in the main 
points. 
I find that modern expert zoologists are chary in opening 
the list for a new species unless there is something absolutely 
new in the form and in the habit of the animal and especially 
as regards its mode of reproduction. 
Fredericella. 
The next genus I have to mention is Fredericella sultana, 
deriving its name partially from its first finder, Frederick 
Cuvier, and partially from its graceful habit when fully 
expanded. 
I know of only one species of Fredericella, and have found 
it in fair abundance in most of the localities where Plumatella 
is established, with the exception of such places as South 
Walsham, and other waters influenced by the salt tides from 
Yarmouth. 
Its statoblasts are rarely to be seen, but as no other mode 
of production is accredited to the polyzoon, this would account 
for its comparative scarceness in all but very favourable 
localities. It is a frequent attendant upon Plumatella, to 
which it occasionally clings as the ivy to the oak. In one 
batch of colonies taken from the Yare near Brundall I found 
the silicious shields of various Diatoms embedded in the mass 
of the tube, or more properly speaking, the coenoecium. 
I have never heard or read of this before, and it may be 
something new to polyzooists. 
