172 Mr. E. Parfitt on two new Species of Freshwater Polyzoa. 



PlumateUa lineata, n. sp. PI. XII. figs. 1-3. 



Coenoecium creeping, adherent, somewhat radiating, reddish 

 horn-colour, cylindrical, with eight or ten dark-brown longitu- 

 dinal lines running the whole length of the tubes. 



Polype- cells barrel-shaped, hyaline, the mouth entire, each 

 having five or six distinct dark-brown annulations, slightly con- 

 stricted at each annulus. 



The orifices or polype-cells frequently produced in pairs. 



Animal white, or with a faint tinge of yellow, having the 

 longest tentacles of any species I have seen. 



Calyx none ? Tentacles sixty-two. 



Statoblasts dark reddish brown, elliptical, with a broad yellow 

 margin. 



Habitat. On the underside of the leaves of water-lilies in a 

 pond in Mr. Veitch's old I*fursery, Topsham Road, Exeter, 

 July 1866. 



In habit this species is like that described by Van Beneden 

 and named by Prof. Allman P. striata. The form of the stato- 

 blast is the same, but the description appended to that species 

 is so brief that I cannot pronounce the one under consideration 

 and P. striata to be the same. Nothing is said of the peculiar 

 lineated appearance of the tubes as seen in this, which to me 

 marks it at once as distinct ; and the peculiar dark annulations 

 on the polype-cells form another good distinction. 



The animal is the largest and I may say the grandest of all 

 the species that have come under my notice, either in reading 

 or seeing the animals themselves ; its name ought to be Pluma, 

 without the diminutive termination. They have a peculiarity 

 of half withdrawing themselves within then* cells, so that their 

 long flexible tentacles alone protrude ; these are then made to 

 sweep the water, waving to and fro something like the Tere- 

 bellas in the sea. 



PlumateUa Limnas, n. sp. PI. XII. figs. 4-8. 

 Coenoecium adherent, branched, the branches growing mostly 

 in pairs, and slightly enlarged towards the orifices, which are 

 somewhat conical, not occupying the extreme end of the tubes, 

 transparent, entire, and raised above the tubes, with three or 

 four folds or rings towards the base. The whole upper half of 

 the tubes or polypidom transparent, hyaline, showing under 

 condensed light a very faint line of dusky granules running the 

 whole length of the tubes. The inferior half of the tubes opake 

 and coated with grains of reddish -brown matter; these opake 

 walls are white inside the tube, and are made up of pentagonal 

 cells, the walls of which are very thick in comparison with the 

 size of the area of the cells. 



