656 RHIZOPODS OF SYDNEY AND LISMORE, 



Genus C r y p t o D i f f l u g i a Penard. 

 Cryptodifflugia oviformis Penard. (PL xxxviii., f.8). 

 Length 17-23, breadth 13-17; orif. 4-8/a. 

 Lismore(185, 197,316). 



Only known from a single locality in Switzerland, and (jiie in 

 Wales. Plentiful in sample 197. 



Cryptodifflugia compressa Penard. (Pi. xxxviii., f.9). 



Length 19-21, breadth 18-21, orif. 6-8, thick 10/x. 



Auburn(104): Botany(17, 37); Clyde, Duck Creek (26); Coogee 

 (93); Guildford (45, 77, 88, 173). "^ , 



Penard, Paune Rhiz., p.428. Only found hitherto in the 

 neighbourhood of Lake Geneva. Widespread in this country, 

 though I have never seen it in quantity. Like all the Cryptu- 

 difflugia3, it is a lover of pond weeds such as MyriophyUum and 

 Elodea. Our specimens very often have a minute, darker-coloured 

 collarette, or thickening of the rim, which gives the appearance 

 of one. Some error has crept into Penard's side-view, I.e., f.2; 

 the orifice, being circular, mu.st be the same breadth in side- and 

 end-views as in front. 



Var. AUSTRALis, n.var. (PI. xxxxiii., f. 10). 

 Test broader than long, dra\\ii out somewhat at the sides. 

 Length 16 19, breadth 18-21, orif. 6-7i/x. 

 Lismore(191,308). 



Var. OVATA, n.var. (PI. xxxviii., f.ll). 

 Test narrower and more ovate than the type, without a thick- 

 ened rim. 



Length 19, breadth 17-18, orif. 5//. 

 Guildford (173); Lismore (308, 314). 



Cryptodifflugia minuta, n.sp. (PI. xxxviii., f. 12, 13). 

 Test minute, ovate, circular in section, rounded behind, sides 

 converging to a \ery narrow base. Orifice very narrow, often a 

 mere foramen, with thickened rim, or sometimes a A-ery narrow 

 but distinct collarette. Membrane thick, smooth, inclined to be 

 rufescent. 



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