THE VICTORIAN NATURALIST. 65 



Class.— CH LOROPHYCE^^. 



Order.— CONJUGATiE. 



Fam. — Desmidiaceae. 



SubFam. I.— SACCODERM^, Lutkemiiller. 



Tribe I.— Gonatozyg^, Liitkem. 



Genus i. — Gonatozygon, De Bary. 



G. kinahani (Arch.), Rabenh. Yan Yean (Res., plankton) 

 G. minutum, W. West ... Whanregarwen (lagoon) 



G. monotcenium, De Bary ... Willsmere (lagoon) 



Genus 2. — Genicularia, De Bary. 



Tribe II. — SpiROT^iiNiE^, Liitkem. 



Genus 3. — Spirotcenia, Breb. 



Genus 4. — Mesotcenium, Nag. 



Genus 5. — Ancylonema, Berggren. 



Genus 6. — Cylindrocyslis, Menegh. 



C. diplospora, Lund. ... Yan Yean (Res., plankton) 



Genus 7. — JVetrium, Nag. 

 N. digitus, Ehr. ... ... Acheron (swamp) 



Sub-Fam. II.— PLACODERM^, Liitkem. 



Tribe III. — Penie^, Liitkem. 

 Genus 8. — Penium, Breb. 

 P. digitus, Ehr. (?) ... Yarra Glen (lagoon) 



P. didymocarpum, Lund. ... Upper Goulburn River (lagoons) 

 (P. closterioides, Ralfs ?) 

 (P. margaritaceum [Ehr.], 



Breb. ?) 

 (P. jenneri, Ralfs ?) 



P. truncatum, Breb. ... Whanregarwen (lagoon) 



P. navicula, Breb. ... Alexandra (lagoon) 



P. niigelii, Breb. ... ... Molesworth (swamps), Chelten- 



ham, Sandringham 



Tribe IV. — CLOSTERiEyE, Liitkem. 



Genus 9. — Roya, W. and G. S. West. 



Genus 10. — Closterium, Nitzsch. 



C. acerosum (Shrank), Ehr — Brighton (s.), Lake Colac 

 [C. aciculare, Tuffen West ?] 



