101 



Tetmemorus Ralfs. 

 T. lævis Ralfs. 



ß. attenuatus Wille. Wille 1: pag. 58, Tab. XIV, fig. 77. 

 Lo 78—87,7, La 24—26, Li ?— 24. 



Amaka, Kap Dalton. 



Boldt II: Tasiusak. 



Lo 57, La sine aciil. 60,8, 



Xanthidium Ehrb. 



1. X. antilopæuin Kütz. 



f. diinazum Nordst. Nordstedt II : pag. 38, Tab. I, Dg. 19. 

 Lo 50, La 47, Li 13. Lo spin. c. 13. 

 Falkefjæld. 

 Borgesen 1: Hekla Havn. 



2. X. cristatum Bréb. 

 Boldt II: Tasiusak. 



3. X. fasciculatum Ebib. 

 Delponte I: Tab. XIII, fig. 20 



Li 13, Lo acul. 16,9. 



Falkefjæld. 



With regard to the dis- 

 tinction between the species 

 antilopœum and fasciciilatum 

 I shall refer to Borgesen 's 

 report (Borgesen I, p. 23); 

 noteven the number of spines 

 is always constant; 1 have 

 seen specimens with four pair of spines on one semicell, and 

 with six on the other (Fig. 6). 



a b 



Fig. 6. 

 Xanthidhnn antilopsnnt Kütz. 

 a: Cellula a fronte, h: Cellula a latere. 



Zygnemaceae. 



Zyguema De By. 

 Z. Cyanos|ioriiin Cleve. 

 De Toni 1: pag. 729. La veg. cell. 22/j. Diani. Spor. 33,8. 



