Maskell. — On Freshwater Infusoria. 69 



The slenderness of tlie extended stem, the sudden widening 

 of the peristome, the deep lateral cleft and the white colour, 

 separate this fi-om all described species. The dimensions and 

 form given were constant in several specimens observed. 



Stentor stHatus, sp. nov. Plate V., fig. 14 ; a, b. 



Body very large, dark-green with almost a blue tinge, highly 

 elastic. When fully extended it has something of the shape of 

 an old-fashioned deep champagne-glass, being narrow and very 

 long, widening gradually from the point of attachment to the 

 peristome, which is not recurved and widened, being scarcely 

 wider than the portion of the body beneath it. The peristome 

 edge is irregular, rising at one spot to a sharp point, and in 

 another depressed in a not very deep groove, beneath which is a 

 sub-cylindrical transverse region of very dark - green colour, 

 reaching nearly to the median line : this appears, when the 

 animalcule is free- swimming, as a conspicuous helical coil. 

 Parenchyma containing several large granular masses, often 

 coloured brown. Contractile vesicle spherical, below the peri- 

 stome. Endoplast long, moniliform. The whole body is marked 

 with broad, conspicuous striae, which are most perceptible in the 

 contracted state, and which give a crenulated appearance to the 

 edge when the animalcule rolls over and is seen from one end. 



Length of the fully extended body j^j inch = 2260 fx. 



Wellington, Ohariu, W. F. Barraud. 



The very large size, dark-green colour, conspicuous strife, 

 and scarcely expanded peristome of this species are sufficiently 

 characteristic. Dimensions and form constant in many speci- 

 mens. 



Order. Peritkicha. 



Genus Halteria. 



Halteria grandinella, Miiller. Wellington, Wainui, Hutt 

 Valley, Karori. 



Genus Strombidium. 



Strombidium claparedii, Kent. Wellington. 



Genus Gyrocoris. 



Gyrocoris occyura, Stein. Wellington, Wainui. 



Genus Urocentrum. 



TJrocentrum turbo, MiiUer. Wainui, Hutt Valley. 



Genus Licnophora. 

 Licnophora setifera, sp. nov. Plate IV., fig. 8; a,h, c. 



Animalcules free-swimming, sometimes attached ; motion 

 very rapid, jerking or twisting. Body very irregularly shaped ; 

 the foot-like region more or less oval beneath, tumid, and bearing 

 instead of cilia a few, about £0, somewhat strong setas, of which 



