60 FRESH-WATER POLYZOA FOUND IN THE 
Alcyonella Benedeni, Allman. 
Specific character.—Cceneecium fungoid ; formed of numerous branched 
vertical tubes, which are emarginate at the orificc, and furnished 
with a furrow.—(Free) Statoblasts elongated.—Allman. 
This well-marked species was found attached to twigs in a 
mill dam at Cold Higham, Northamptonshire, on the 18th July, 
1876, in company with A. fungosa; and the latter was also 
found in the same place in August, 1877. 
The rarity of A. Benedeni must be my apology for inserting 
a form not found in our district ; only one locality for it being 
recorded by Pror. ALLMAN, viz. :—Chelmar Canal, Essex. 
Plumatella repens, Linneeus. 
Specific character.—Coenecium irregularly branched, cells sub- 
claviform, destitute of furrow and keel. Tentacula about sixty ; 
margin of calyx distinctly festooned. Statoblasts broad.—Allman. 
Found 9th June, 1874, in the Serpentine, Curzon Park; on 
the 27th August, 1876, in Canal, near Stone Bridge; and also 
in Canal, near Water Works, 29th April, 1877; in Canal, near 
Tarvin Road Bridge, and also in Canal, near Mollington Road 
Bridge, on 26th August, with Fredericella sultana. 
Plumatella Dumortieri, Allman. 
Specific character-—Coencecium adherent, irregularly branched ; cells 
somewhat dilated towards the orifices, with a furrow carinated. 
Tentacula about fifty; festooning of calyx deep and distinct. 
Statoblasts broad.—Aliman. 
Our late and lamented friend, Mr. Cross, found this at Ashton 
Hayes, in a pond belonging to Mr. Parr, on the 19th June, 
1875. 
There was a difference of opinion about this species; some of 
our members thought it P. repens, but the specimens I saw 
certainly agreed with Pror. ALLMAN’s description of Dumor- 
tiert, It had a very peculiar flickering or pulsating motion in 
its tentacles, which I have not observed in any other species. 
Pror, ALLMAN gives one locality only tor this species,—viz., 
Crix, Essex. 
