40 THE VICTORIAN NATURALIST. 



Class IV.— HETEROKONTv^. 



Order.— CON FERVALES. 

 Fam. — Tribonemacese. 



Genus. — Ophiocytium, Nag. 



O. parvulum (Pertz.), A. Br. ... Heidelberg 

 O. bicuspidatum (Borge), Lemm. Cheltenham 



Fam. — Botrydiacese 



Genus. — Botrydiuni, Wall. 

 B. granulatum (L.), Grev. ... Alexandra and Willsmere 



Class v.— BACILLARIACEvE. 

 (Omitted — reserved for a separate paper.) 



Class VI.— MYXOPHYCE^E. 



Sub-Class. — Arehiplastideee. 



Order.— HORMOGON E/E. 



Sub-Order.— PSILONEMATE^. 



Fam. — Nostocese. 



Genus. — Nostoc, Vauch. 



N. linckia, Borge ... ... Botanical Gardens, Melbourne 



Genus. — Anahcena, Bory. 



A. insequalis (Kiitz.), Born et Flah. Yan Yean Reservoir 

 A. flos-aquae (L.), Ralfs ... Yan Yean Reservoir 



Fam. — Qscillatoriaceae. 



Sub-Fam .— LYNGBY^. 



Genus. — Microcoleus, Desmaz. 



M. delicatulus, W. and G. S. 



West ... ... ... Camberwell (ditch) 



Genus. — Lynghya, C. Ag. 



L. perelegans, Lemm. ... Yan Yean (weeds) 



Genus. — Phortnidium, Kiitz. 



P. autumnale, Ag. ... ... South Yarra (gutter) 



Genus. — Oscillatoria, Vauch. 

 O. tenuis, Ag. ... ... Whanregarwen, Doncaster 



Genus. — Spirtdina, Link. 

 S. oscillarioides, Turp. ... Merri Creek, &c. 



