186 SOME NEW OR LESS KNOWN DESMIDS FOUND IN N. S. WALES, 



Forma a vertice visa 5-angulata, angulis in radios longos rectos 

 attenuatos singulos productis; apicibus radiorum 2-3 aculeis, 

 magnis conspicuis munitis ; radiorum parte interiore glabra 

 exteriore obscure 3-denticulata. Membrana tenue apicibus 

 radiorum vulgo exceptis. 



Lat. c. rad. 7b-\'20fx. 



Collector. 



Forma 6-radiata Lund., I.e. 



Marginibus omnium radiorum 3-4 denticulatis. 



Long. c. rad. 63, 67, — , 72, — , — , — ; long. s. rad. 48, 50,52,60, 

 — , — , — ; lat. c. rad. 9 3, 94, 93, 105, 102, 108, 123,.. 



Collector, Botany, Centennial Park. 

 Forma 7-radiata Lund., I.e. 



Unam tantum cellulam vidi; rara. 



Lat. c. rad 102yn. 



Collector. 



Forma 6-radiata, parte interiore glabra processuum puncta- 

 graniilis in series trans versalibus binis dispositis ornata. 



Long. s. rad. 52; lat. c. rad. 93/m. 



Forma marginibus processuum superiorum perfecte glabris. 



Curiously enougli, none of the specimens answered to /3 p7'o- 

 ducium Nord., Alg. N.Z. p.35, T.4, f.l, q.v.; for although a few 

 of the 5-rayed forms did show a truncate produced apex, and 

 were about the size required, yet being immature (the upper rays 

 only just started) it would not have been safe to have referred 

 them to that variety when all the rest belonged undoubtedly to 

 the typical form. The immature 5-rayed form here figured was 

 found as complementary semicell to a more mature semicell 

 showing both upper and lower lays. I have never seen the 

 corresponding 6-rayed form. 



St. S0NTHA.LIANDM Turn., Alg. E. Ind. p.l24, T.14, f.27. 

 (T.v. f.2). 

 Long. 40; lat. 55-56/li. 

 Botany; Rose's Lagoon, Collector. 



Almost exactly corresponding in shape and size with Turner's 

 figure: cf. also I.e. T.16, f.36. The ends of the processes in Aus- 



