108 PLUMATELLA JUGALIS. 



11. Plumatella Bumortieri, Allman. PI. VIII, figs. 1 — 5. 



Specif c character. — Coenoecium adherent, irregularly branched ; cells somewhat dilated 

 towards the orifices, with a furrow carinated. Tentacula about fifty ; festooning of calyx 

 deep and distinct. Statoblasts broad. 



Synonym. — 1850. PhimateUa Dunioriieri. Allman, British Association Report. 



Iconography. — No published figure. 



Habitat. — On submerged plants in still water. 



Locality. — In a pond at Crix, in the county of Essex, the property of Samuel 

 Shaen, Esq. G. J. A. 



This species has as yet been met with only in one locality, where, though I found several 

 specimens, it was far from being abundant. It presented a small, irregularly branched 

 coenoecium, closely adherent to the submerged portions of Potomogeton natans and other 

 aquatic plants. The ectocyst is yeilowish-brown, becoming, as in all the furrowed species 

 with which we are as yet acquainted, lighter coloured towards the extremity of the ramuli, 

 and tlien assuming the thin transparent condition, which it retains as far as the 

 orifice. This transparent portion is frequently dotted with minute brown points. The caly- 

 ciform membrane of the polypide is nearly as deeply festooned as in Fredericella, and the 

 statoblasts are broadly elliptical, resembling those of P. repcns. I met with it in the month of 

 July. 



I have given to this species the name of M. Dumortier, a naturalist to whom we are in- 

 debted for some of the most valuable information we possess on the fresh-water Polyzoa. 



11. Plumatella jugalis, Allman. PI. VI, figs. 1, 2. 



Specific character. — Coenoecium adherent, consisting of two series of branches connected 

 by a common tube, and extending in opposite directions; cells of uniform diameter, with a 

 furrow which passes below into a keel. Tentacula about forty ; calyx with shallow festoons. 

 Statoblasts not known. 



Synonym. — 1850. Plumatella juyalis. Allman, British Association Report. 



Iconography. — No published figure. 



Habitat. — On submerged plants in still water. 



Locality. — Canal near Little Baddow, Essex. G. J. A. 



