ALGOLOGICAL NOTES. 



This variety, which seems principally to have an Austral- 

 asian distribution was represented with a few specimens. 



Cosmarium sublatum Nordst. 

 Nordstedt: op. c. 



I am in some doubt if the Alga I observed really should be 

 referred to Cosmarium sublatum,. The very few specimens I 

 observed were nearly identical with the drawings of Prof. 

 Nordstedt. 



The European records of this species may be depending 

 upon some misconception of the specific features, but the system- 

 atical position is still somewhat uncertain. 



Cosm^arium TjibenongpMse Gutw. 

 GuTvs^iNSKi: Alg. Racib. 1899 Ins. Jav. Coll. 

 G. S. West: Algæ Yan Yean. 



This remarkable Desmid was scarce in the collection. I 

 think that the forma of G. S. West is the principal form, and 

 that the drawings of Gutv^inski are not very accurate. 



The species differs from some forms of Gosmariuin con- 

 tractum in the angularity of the semicells. 



Genus Arthrodesmus Ehrbg. 

 Arthrodesmus curvatus Turner. 



W. B. Turner : Freshw. Algae E. India. 

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

 This characteristic species was observed a few times. It is 

 tropical in its occurrence. 



Genus Staur astrum Meyen em. Ralfs, 

 Staurastrum assurgens Nordst. 



Nordstedt: Freshw. Algae New Zealand. 

 Scarce. 

 Staurastrum contortum var. pseudotetracerum Nordst. 

 Nordstedt: op. c. 

 Somewhat rare. 



