6 KAARE MÜNSTER STRØM 



Staurastrum excavdtum W. & G. S. West. 

 W. & G. S. West: in Trans. Linn. Soc. 1895. 



This species, which should never be confused with Staur- 

 astrum tetracerum was scarce. 



Staurastrum galeatum Turner. 



W. B. Turner: Freshw. Algæ E. India. 



The typical form of this species was observed in the col- 

 lection. 



Staurastrum patens Turner. 

 W. B. Turner : op. c. 



The forms observed were furnished with two spines, just 

 as Turner originally described the species. 



Staurastrum pinnatum, Turner. 

 W. B. Turner : op. c. 

 W. & G. S. West: Freshw. Algae Ceylon. 



The forms observed agreed very well with the drawings of 

 Messrs. West. The arms possessed two to four undulations 

 each. The species occurred very frequently. 



PI. I, Fig. 20. 



Staurastrum Sonthalianum Turner. 

 W. B. Turner: op. c. 



The Desmid 1 observed was very much resembling the 

 Staurastrum Sonthalianum. Unfortunately, I only observed 

 one specimen, and could only obtain the vertical view. The 

 form agreed very well with the original figures of Turner, and 

 I doubt if the form described by Messrs. West from Burma 

 should be referred to this species. 



I think, it should be recognized as a separate one. 



PI. I, Fig. 19. 



? Staurastrum suhdenticulatum Nordst. 



I observed a Desmid, which bare a striking resemblance to 

 the species described by Nordstedt from New Zealand. 



As I did not observe more than a single specimen, I do 

 not venture to identify my Desmid with the species. 



