826 AUSTRALIAN FRESHWATER PLANKTON, 



Genus C h l a m y d o m o n a s Ehr. 



ChLAMYDOMONAS GLfEOCYSTIFORMIS Dill. 



Cell. long. 20-21, lat. 17-21; corp. long-. 13-16, lat. 8-10/x. 



Botanic Gardens (125). (PI. Ivi., f.ll). 



Cell. long. 14-18, lat. 12-15; corp. long. 8-10, lat. 7-8/x. 



Lismore(263). (PL Ivi., f. 12). 



Cf. Dill, Gatt. Chlamyd., p. 18, T. v., f.37, .38; Wille, Gatt. 

 Chlaniyd., Alg. Not. xi., p. 143, T. iv., f.l7; Bernard, Protococc. 

 et Desm., p. 163, f.307, 308. The last-named gives, membrane, 

 20-25 X 17-20; inner cell, 16-17 x 12-13/x. Our Lismore speci- 

 mens are considerably smaller. 



Chl. pisiformis var. cylindracea Playf. 

 Cell. long. 21-26, lat. 12-15/x. 

 Rookwood. 



Var. attenuata, n.var. (PI. Ivi., f.l3). 

 Cellulse a tergo attenuatse; long. 20, lat. 1 2/i. 

 Rookwood. Cum priori. 



Vai\ glceocystiformis, n.var. (PI. Ivi., f.l4). 



Cellula? cylindraceae, angustpe ; apicibus rotundatis ; bina? in 

 coenobio mucoso involutse. 



Cflenob. (2 cell.) diam. 50; cell. long. 20, lat. 8/i,. 



Botany. 



A family of 4 ccenobia, in a vegetative Gloeocystis-condition, 

 npted. The mucus was somewhat laminated. There were two 

 cells in each coenobium, the chloroplasts showing the chai-ac- 

 teristic arrangement of Chlamydomonas. The cells were placed 

 head to tail, and were narrower and more strictly cylindrical 

 than usual. This form is another point in favour of my con- 

 tention that Gheocystis and Sphcerocystis are vegetative states 

 of Chlamydomonas. 



Chlamyd. globulosa var. pertusa, n.var. 

 Cellulie sphjerica?, fronte levissime deplanata?. Chloroplastis 

 angusto linear! furamine supra pyrenoidem instructa. 

 Cell. long. 18, lat. 20; foramin. long. 6/*. 



