FRESHWATER Ai'.i FROM JUAN FERNANDEZ AND EASTER ISLAND 89 



1 1 . Trentepohlia aurea ? forma. 



Forma in Printz: Subaerial Alg;c from South Africa. Det Kgl. Norske Viden- 

 skabers Selskabs Skrifter 1920. Trondhjem 1921. 



The form observed very much resembled the forma recorded by PRINTZ 

 from South Africa. The filaments were a little broader (breadth from 10 to 

 15 [j.) but he also mentions specimens up to 17 |j,. 



I quite agree with Dr. Print/ in regarding the difference between Trente- 

 pohlia aurea and Trentepohlia abietina as insufficient for specific separation. 

 The reasons for this, put forward in his paper seem very convincing. Pre- 

 viously a couple of Trentepohlia species are known to occur in Juan Fernandez 

 and Easter Island, such as Trentepohlia polyearpa and the doubtful 'Trente- 

 pohlia Tuckermanniana . 



Masatierra: in caves, Cumberland Bay. 



Area of distribution: previously only known from South Africa. 



Order Protococcales. 



Family Protococcacese. 



Genus Chlorella Beijerinck. 



12. Chlorella ellipsoidea Gern. 

 Gerneck: Z. Kenntn. nied. Chlorophyceen. 



The specimens, which occurred in considerable quantities, were all very 

 badly preserved and the cytological structure could not be observed with accur- 

 acy. To judge from their size, however, they seem to belong to Chlorella 

 ellipsoidea Gerneck and certainly they come nearer to this than to any other 

 species of the genus. 



Masatierra: forming green, slimy masses on rocks in cave. 



Area of distribution: hitherto only reported from a few countries, mostly 

 from cultures in laboratories, but undoubtedly of wide distribution. 



Class Myxophyceae. 



Order Coccogoneae. 



Family Chroococcaceae. 



Genus Chroococcus Naegeli. 



13. Chroococcus minor (Kuetz.) Naeg. 



Naegeli: Gatt. Einz. Alg. ; Protococcus minor Kuetzing: Species Algarum. 



The specimens observed were few and in no good state of preservation. 

 I have compared them with the original ones in the herbarium of NAEGELI 



