BY THOMAS WHITELEGGE. 503 



Heterophrys, Archer. 



Heterophils sp. 1 I have on several occasions seen a species 

 closely allied to, if not identical with, one figured by Lt'idy on 

 pi. xlvi. figs. 7, 8, 9, 13. It existed in a pool of water 

 off Bunnerong Road, which is unfortunately now quite dry. 

 In the same place I found also a colourless gregarious species 

 resembling Raphidiophrys elegans, but much smaller and 

 destitute of silicious spicules. The pseudopodia are highly 

 sensitive and the creature retracts them somewhat suddenly 

 if disturbed. It also readily assumes an amoeboid form if 

 subjected to pressure. I hope to re-examine both these 

 forms on some future occasion. 



Raphidiophrys, Archer. 



R. elega?is, Hertwig and Lesser. Archiv fur Mik. Anat. X. 

 1874 ; Leidy, F. Rhiz. N. Amer. 250, pi. xlii. figs. 1-6. 

 This species is not common. I have seen it from two localities 

 only, near shea's Creek and in the stone quarry in Moore Park. 



Vampyrella, Cienkowski. 



V. lateritia, Fresenius, Abh. Senck. Naturf. Gesells. II. 1856-8, 

 218, Taf. x. figs. 13-19; Leidy, F. Rhiz. N. Amer. 253, 

 pi. xlv. fig. 10-16. 

 Frequent on Fpirogyra and other floating Algae ; often free, 

 but usually creeping over the surface of aquatic plants. 

 Localities, Shea's Creek and near Cook's River. 



Actinosphaerium, Stein. 



A. Eichhornii, Ehrenberg, Bericht. Preus. Ak. Wiss. 1840, 198; 

 Leidy, F. Rhiz. N. Amer. p. 259, pi. xli. 

 A very common species, abundant in the Waterloo Swamp and 

 many other places. 



Clathrulina, Cienkowski. 



C. elegans, Cienk. Archiv fur. Mik. Anat. III. 1867, 310, Taf. 

 xviii. ; Leidy, F. Rhiz. N. Amer. 273, pi. xliv. 



