658 RHIZOPODS OF SYDNEY AND LISMORE, 



membrane is perfectly smooth and free from flints, and observa- 

 tion with jV oil imm. obj. failed to show any trace of plates or 

 of structure. 



Var. (iLOBOSA, n.^■ar. (PL xxxviii., f.l9). 

 Test subglobose. Length 17-20, breadth 15-18, base 7-8/x. 

 With the type. 



Cryptodifflugia pusilla, n.sp. (PI. xxxviii., f.20). 



Test minute, subquadrate, as broad as high, with broadly 

 rounded dome, straight sides almost vertical, base full width of 

 the test or neai'ly so. End-\ iew circular, simple, almost as broad 

 as the base. Membrane smooth, thick, chitinous, structureless, 

 without flinty particles. 



Length = breadth = 1 0/a. Guildford (23). 



Var. CONICA, n.var. (PI. xxxviii., f.20«). 



Test longer than broad, conical or truncate-oval; dome rounded; 

 sides arched; base equal or almost equal to the breadth <jf the 

 test. 



Length 12, breadth 10/x With the type. 



Nebelina. 



Genus H y a l o s p h e n i A Stein. 

 Hyalosphenia nobilis v. compressa, n.var. (PL xxxix., f.l). 

 Body of the test compressed somewhat, neck circular in section, 

 orifice circular. Cf. Cash, Ac, ii., p. 92, P1.25, f.l 3. 

 Length 154-175, breadth 70, orif. 27-30, thick 50/x. 

 Coogee. 



Hyalosphenia Coogeana, n.sp. (PL xxxix., f.2). 



Test the sliape of a soda-water bottle, body broadly elliptical, 

 conical behind, contracted in front into a long, distinct neck with 

 nearly parallel sides. Orifice with slight everted rim. Neck 

 three times suddenly constricted as if with string, at its junction 

 with the body, immediately below the orifice and at the anterior 

 third below. Membrane smooth, structureless, apparently chitin- 

 oid, faintly rufescent. End-view circular(?), compressed (?). 



Length 157, breadth 70, orif. 23/x. Coogee. 



