612 SOME SYDNEY DESMIDS, 



mediate in character between var. Grunovii and var. crux 

 australis. 



Var. crux australis (Rac.) mihi. (Plate xii., fig.4). 



Eu. verrucosum var. crux australis Rac, Desm. Ciast. T.2, f.26, 

 fig. sinistr. 



Membrana, ut semper in Eu. turgido, grosse scrobiculata. 

 Endochroma in laminas 4 disposita. 



Long. 138-174; lat. 111-138; crass. 78-96; lat. isth. 42-48; lat. 

 lob. pol 73-114; crass, lob. pol. 36; lat, coll. 72-96 M . 



Auburn (7, 10, 21, 68), Guildford (78). 



Var. Grunovii Turn, forma?. (Plate xii., fig.3). 



Lobi polares a vertice visi non bifidi. Endochroma atque 

 nuclei amylacei ut in var. Mobii supra. 



Long. 120-142; lat. 102-126; lat. lob. pol. 69-90; lat. coll. 58-72; 

 lat. isth. 42-48; crass. 78 M . 



Auburn (68), Fairfield (79). 



Grunow's figure in Desm. Insel Bank a, T.2, f.22, works put at 

 long. 140, lat. 108, lat. lob. pol. 72, lat. coll. 52 F . 



Var. simplex, n.var. 



Forma ad Eu. verrucosum var. simplex Josh (in Turn., Alg. E. 

 Ind. T.l 1, f.9*) accedens sed sinu aperto; lateribus late-rotundatis 

 granulis paucis ornatis; lobo polari piano, indiviso, mmime pro- 

 ducto; tumore basali minore. 



Long, semicell. 54; lat. 102; lat. lob. pol. 54; lat. isth. 42^. 



Guildford (78). 



The life-history of Eu. turgidum Wall., as known here, runs 

 as follows : — 



(1) Var. simplex mihi; (2) var. Auburnense mihi; (3) var. crux 

 australis (Rac); (4) var. Ridleyi West & West (intermediate 

 lobes undivided); (5) var. crux australis f. evoluta (Rac) or Eu. 

 turgidum Wall, as in Turn, l.c T.10, f.28 (intermediate lobes 

 bifid); (6) var. Mobii mihi, vide Bail. Bot. Bull. xv. T.13, f.12. 



