494 AUSTRALIAN FRESHWATER POLYZOA, I., 



voir. I assume that it will not flourish in such portions of the 

 water-system where it is subjected to the direct iufluence of the 

 sun's rays; and further, that its distribution in the pipe-line and 

 screening tank is determined by its need for oxygen, which 

 would be most abundant at the commencement of the pipe-Mne 

 and where the water is again exposed to the air at the screening 

 tank. I have no data to show the influence of pressure on the 

 animal, but have found that it will live at a depth of 20-25 feet 

 in the screening tank." 



In its habits this species resembles F. sultana, which grows 

 during the whole of the spring, summer, and autumn months, 

 both in standing water and rivers, generally avoiding direct 

 exposure to the daylight. 



The following is a complete list of the forms recorded to date 

 from Australasia : — 



Victor ella 2)avida Saville Kent. — This genus is represented by 

 one species, found by Whitelegge in brackish water on a species 

 of Nitella in company with a tube-dwelling rotifer, CEcistes sp., 

 in Cook's River. As far as I am aware, this form has not been 

 recorded since. 



Lophopus Lendenfeldi Ridley. — This species was named from 

 specimens obtained by Whitelegge (and not by Leudenfeld) from 

 the stems of aquatic plants in Parramatta Park. This species 

 has not been found outside New South Wales. It differs from 

 L. crystallinus chiefly in the absence of terminal angles of the 

 statoblast, and the knobbed form of the inner end of the endocyst. 

 The tentacles are also far longer than those of L. crystallinus. 



Paludicella ehrenhergii Van Beneden. — Hamilton has recorded 

 tliis species from Dunedin, New Zealand. 



Flumatella Aplinii Macgillivray. — This species has been 

 recorded from Victoria and New South Wales, and is undoubtedly 

 a well founded form. I think that this form has also been found 

 in New Zealand. 



Flumatella princeps Kraepelin (P. emarginata Allman, 1844; 

 P. repens Van Beneden, 1848 F. diffusa Leidy, 1851.) — This 

 species occurs abundantly in Queensland, New South Wales, and 



