BV G. 1. PLAYrAlR. 533 



Cf. Vnuicput oralis (France) Lemni. in AMlle, Conj. u. Chloropli., 

 p.59, £.31, wliicli works out at 25 x 15J/x. Our form, however, 

 is distinct!}' oblong. The contents are deep green, showing 

 signs of division into four parts. 



Genus L A g e r h p: i m i a Chodal. 

 Lagerheimia elliptica, n.sp. (PI. Ivii., f.ll). 



Cellulse exacte ellipticse, graciles, utroque polo setis longis sub- 

 apicalibus binis instructse. Cell. long. 12 J, lat. 6: set. long. 2()/x. 

 Sydney Water-supply (100). 



The nearest form to this, I know of, is L. geneveiisis v. (jracilU 

 Playf., {L. ciliata v. (jracilis) Plankt. Sydney Water-supply, PI. 

 liii., f. 10-1 2. The latter, however, is narrowly cylindrical, while 

 this form is a perfect, slender ellipse. 



Genus Bernardia Playf. 

 Bernardia tetraedrica, n.sp. (PI. Ivii,, f.l2). 



Cellulcie sphfericse, spinis longis cavis gracillimis 4, tetraedrice 

 ordinatis instructfe; spinis basi valde inflatis, apice obtusis. 



Diam, c. spin. 30; cor^^. 5//. Lismore (351). 



This species consists of a single spherical cell with (apparently) 

 the membrane drawn out into four long very slender hollow 

 spines, arranged tetraedrically. The spines are blunt at the 

 extreme tip, not acutely pointed, and at the base are greatly in- 

 flated. Chloroplast delicate, pale green, parietal, confined to the 

 central part of the cell. Cf. Bernardia Chodati (Bernard) Playf., 

 Austral. Frw. Phytopl., PI. lix., f.5, 6. 



Genus Kirchneriella 8chm. 

 IviRCHNERIELLA OBESA W tt. G. S. West. (PI. Ivii., f 13-16). 

 Cell. lat. G-10, alt. 6-8, crass. 3i-5/x. Clyde, Duck Creek(26). 

 Cf. W. A: G. S. West, New Brit. Frw. Alg., p. 16. Syn., 

 >S''lenasfrniu ohesum W. West, Alg. Eng. Lake Dist., p. 22, PI. x., 

 f. 50-52; K. mibmlifaria G. S. West, Some Critical Green Alg{«, 

 p. 285, PI. 20, f. 20-30. Dimensions of the type, "diam. max. 6-9/x, 

 crass, cell. 3-4 •2/a"; of K. subsolitaria, "diam. max. 6-7/x, crass, 

 cell. 2 '9-3 -2/7-." I have found this form only once. 



