642 RHIZOPODS OF SYDNEY AND LISMORE, 



than the base. Orifice very wide, nearly as broad as the base, 

 not at all invaginate nor re-entrant, not furnished with any 

 dependent membrane. Membrane of the test pale yellow red, 

 always showing at least a faint punctulation, sometimes very 

 distinctly and coarsely scrobiculate. 



Di.im. 16-22, alt. 8; orif. IS-IT/x. 



Sydney Water-Supply (100); Lismore(iy5, 316, 333); Wood- 

 lawn (225). 



Var. ALTA, n.var. 

 Test with a more arched dome, otherwise like the type. 

 Diam. 20, alt. 10; orif. 1 6/x. 

 Botanic Gardens (150); Lismore(195, 196). 

 This species is a lover of weeds, and is generally found in 



gatherings shaken out of 

 MyriophyUuin and Elodea. 

 Var. alia is something like 

 P. operculata Ehr., but the 

 mouth is never invaginate, 

 nor is there any dependent 

 Fig.o. membrane. Scrutiny with 



[a) PyxiUcida scutdla, n.^i^.A^y^^^), the yW oil imm. obj. shows 

 scobiculate form; [h) var. aha, that the scrobicula^, wl.ich are 

 n.^al•., ( x 1000, punctate form; . . .. 



, , , . , M^(^fx\ so much in evidence in some 



(c) eiid-view, ( x 1000). 



specimens, are present as faint 

 white spots, even in tests that appear quite clear. 



Genus Pseudochlamys CI. tk Lachm. 



PSEUDOCHLAMYS PATELLA C. ik I.. 



Diam. 45-48, alb. 10/x. Grafton (265); Nymboidia R.; Lis- 

 more (328). 



Genus C e n t k o p y x i s Stein. 

 Centropyxis arcelloides Penard. 

 Diam. 59, alt. 4 2; orif. 27, nit. 4/^. Botany (152). 



Gentkopyxis L.EVifMTA Penaid. 

 Diam. 65-70, alt. 42-51, base 53; orif. 17-20, alt. 10//. 

 Lismore (190). 



