134 



Genus Staurastrum Meyen 1829 em. Ralfs 1845. 



37. Staurastrum Dìckiei Ralfs. 

 Ralfs : Brit. Desm. 



A few specimens were observed. 



38. Staurastrum paradoxum Meyen. 

 Meyen in Nov. Act. 1829. 

 Scarce. 



39. Staurastrum punctulatum Bréb. 



De Brébisson in Ralfs : Brit. Desm. 

 Quite common in one or two collections. 



40. Staurastrum tellferum Ralfs. 

 Ralfs : Brit. Desm. 



General in several collections. 



41. Staurastrum tetracerum Ralfs. 

 Ralfs in Ann. Mag. Nat. Hist. 1845. 

 Not uncommon. 



Genus Desmidium Agardh 1824. 



42. Desmidium Swartzii Ag. 



Agardh : Disp. Alg. Suec. 

 In a single sample. 



Genus Hyalotheca Ehrenberg 1841. 



43. Hyalotheca dissiliens (Dillw.) Ralfs. 

 DiLLWYN : Brit. Conferv., Ralfs: Brit. Desm. 

 Scarce. 



Christiania 

 The Botanic Museum of the Royal Fredericks 



University 



January i8th, 1922. 



