650 RHIZOPODS OF SYDNEY AND LISMORE, 



102 X 70, orif. 34//,; and one of var. leres (Penard) Cash, lengtli 

 250//,, both composed of exceedingly coarse flints. 



Forma. (PI. xxxvii., f.6). 



Test asymmetrical, with merely a point behind, not a tail. 

 Collar sometimes wanting. Test inclined to be chitiiious, with 

 small, detached flints or minute grains. Length 97-100, breadth 

 70-72, orif. 27/7.. 



Guildford (23); Lismore (185). 



DiFFLUGiA Penardi Hopkinson. (PI. xxxvii., f.7). 



Length 74, breadth 48, orif. 30//. Lismore (335). 



Syn., D.fallax Penard, Faune Rhiz., p. 245: cf. Hopkinson in 

 Cash, /.c , ii., p. 14. Penard gives 65-80/x long, but no breadth. 

 Cash gives the breadth as 30/x. The only example I have noted 

 was half as broad again. This is perhaps the D. acuminata b, of 

 Levander, Wasserfauna, p. I 4, T. i., f.8 (60 x 30/x). 



DiFFLUGiA Levanderi, n.sp. (PI. xxxvii., f.8, 9). 



Test lanceolate or mitriform, short and broad; dome shaped 

 like a pointed arch, the sides arched and converging right down 

 to the orifice Orifice wide, circular, simple, without rim or 

 collar. Test rough with large flints, or chitinous with very 

 small granules, orifice not specially margined. 



Length 78-116, breadth 51-78, orif. 32-42/x. 



Lismore (335). 



Two different sizes are combined in the dimensions above, the 

 larger coarsely stony, the smaller chitinous, with small, scattered 

 grains. They seem to be identical with D. acuminata c, Levan- 

 der, Wasserfauna, p. 15, T. i., f.9, who also gives two distinct 

 sizes, viz., 110 x 60, and 70 x 40; orif. 24/x. 



DiFFLUGiA AMPULLULA, n.Sp. (PI. XXXVii., f.lO, 11). 



Test broadly ovate, with a hemispherical dome, and sides 

 gradually converging in almost straight lines to the broadly 

 truncate base, where the test is suddenly constricted into a 

 aarrow, slightly everted collar. Dome sometimes capped with a 

 'uinute, pointed, apiculate process. Orifice circular, simple. 



Length 72-89, breadth 52-65, orif. 21-30, collar 4-8/u high. 



1 



