98 On some new Australian Polyzoa . 



Lepralia Candida, new species (Pig. 4). Cells small, dis- 

 tinct, ovoid or roundish, prominent ; mouth semicircular ; 

 front of cell smooth, with a central pore and several round 

 markings, seemingly vacuities between the layers of the 

 cell-wall, of which two are constant, and placed above the 

 central pore. 



Queenscliff, on mussel- shells. 



A very small species of a beautiful pearly whiteness, which 

 seems distinct from any hitherto recorded. 



Lepralia canaliculata, new species (Fig. 3) . Cells irregular, 

 confused, immersed; mouth large, straight below, arched 

 above, lower lip slightly thickened ; five or six stiff spines 

 produced from the upper border ; a series of grooves extend- 

 ing inwards from the margin towards the clear suboral 

 portion, in the centre of which is a round pore ; a single 

 avicularium situated on one side of the cell. 



Queenscliff, on mussel-shells. 



The only species with which this can be confounded is 

 L. alata (Busk.), from which it may readily be distinguished 

 by the suboral aperture. 



Explanation of Plate. 



Fig. 1. Flustra denticulata, var. , natural size. 



,, 1«. ,, ,, ,, magnified. 



Fig. 2. Carbasea cyathiformis, natural size. 



,, 2a. ,, ,, front of cells, magnified. 



,,26. ,, ,, back of cells, magnified. 



Fig. 3. Lepralia canaliculata, natural size. 



,, 3«. ,. ,, magnified. 



,, 3b, ,, ,, single cell, still more magnified. 



Fig. 4. Lepralia Candida, magnified. 

 Fig. 5. Membranipora perforata, magnified. 



