812 



PER1DINEAE OF NEW SOUTH WALES, 



diam. 4-5 fi ; rhomboidal loop lat. max. 12£ p. and perhaps more. 

 The ratio of "total length" to "altitude of epivalve" in eight 

 specimens taken haphazard was 1.7, 1.7, 1.8, 1.8, 1.8, 1.8, 1.9, 

 2.0 to unity. Specimens were observed partly striate and partly 

 latticed . 



Peridinium willei var. australe G. S. West. (Text-fig. 17) . 



Long. 37-57, lat. 40-55, crass. 32-43 ^ 



Botany (17); Sydney Water Supply (66); Lismore (308). 



Syn. Peridinium Volzii var. australe G. S. West, Algae of the 

 Yan Yean Res., p. 80, f. 10 A-G. P. Volzii Lemmermann (Dr. 

 Volz gesammelten Siisswasseralgen, 1904, p. 166, T. xi., f. 15- 



Text-%.17. 

 Peridinium willei var. australe G. S. West, (x 500). 



18) is practically P. Willei Huitfeld-Kaas wrongly drawn, and 

 curiously enough the same error is present in the figure of the 

 Victorian specimens. The band separating the 4th equatorial 

 plate in the epivalve from the large dorsal apical plate has 

 been omitted, as a comparison of the dorsal view of the 

 cell (I.e., fig. 10 B) with the diagram of the epivalve (fig. 10 C) 

 will show. There is a slight error also in Huitfeld-Kaas' type 

 figure, the antapical plates are reversed from right to left, the 

 hypovalve having probably been viewed from the inside. The 



