603 



SOME SYDNEY DESMIDS. 

 By G. I. Playfair. 



(Plates xi.-xiii.) 



With one or two exceptions the Desmids described in this 

 paper were obtained from the suburbs of Sydney. Of those 

 mentioned, five are believed to be new species, and thirty-six 

 distinct varieties or new forms of others. Since my last notes 

 were published, several papers have come into my possession 

 which I had previously only been able to glance over. A 

 thorough perusal of these has necessitated some rearrangement 

 of forms previous^ named; this has been attended to in the text. 

 The numbers found in most cases against the localities refer to 

 samples of gatherings preserved in the National Herbarium, 

 Botanic Gardens, Sydney. 



The locality referred to as Coogee is noteworthy as being a 

 small tract of Sphagnum bog, the only one that has come under 

 my notice as yet. As these bogs generally have a distinctive 

 Desmid-flora of their own, a list of the species commonly asso- 

 ciated there may perhaps be interesting to workers in other lands. 

 One of the most abundant is Cos. glyptodermnm West & West, 

 known hitherto only from East and Central Africa, and with it 

 are generally Cos. turgidum, Cos. amplum, Cos. Boeckii vars., Cos. 

 quadri/arium f. hexasticha, Cos. reniforme co?npressum, Cos. 

 validius, PI. crenulatum, PL ovatum, Pen. australe, Pen. libellula, 

 Pen. digitus, Pen. spirostriolatum, Eu. dideltoides, Eu. sinuosum 

 vars., Micr. truncata vars., Micr. papillifera vars., Micr. euas- 

 troides # indivisa, CI. Delponiei vars., CI. nematodes var., CI. 

 Diance, St. submonticulosum vars., St. alternans. In the late 

 autumn, April and May, a large assortment of these may be 



