232 



191. S. Bieneanum Rab. 



Trangisvaag (Syd.). 



Var. spetsbergensis Nordst. 



Desm. arct. p. 33, tab. VIII, fig. 35, 



Long. = 38 /^; lat. =: 31 /^. 



Found in collections from San do; and Trangisvaag (Syd.). 



I have only seen triangular forms. 



192. S. orbiculare (Ehrenb.) Ralfs. 



In tiie nciglibonrhood of Thorshavn (Str.). 



193. S. muticum Bréb. 



In a gathcM'ing from Svartafoselv ncar Thorshavn (Str.). 



194. S. dejectum Bréb. 



Fonnd in materials from Gliversrcjn ncar Thorshavn (Str.); Skopen, 

 Sand and in Phuikton from Grothnsvatn iSando). 



195. S. Dickiei Ralfs. 

 Brit. Desm. tab. 21, fig. 3. 

 Gliversrcjn (Str. i; Skopen (Sandol 



196. S. megacanthum Lund. Formå. Plate VIII, fig. 2. 

 Desm. Suec. p. 61, tab. 4, fig. 1. 



Formå færoensis a formå typica præcipiie differt magiiitudine 

 minore, longitudine præ latitudine majore sinu mediano late rotun- 

 dato, aculeis minoribiis. 



Long. = 38 fi; lat. ciim acul. = 51 /<; long. aciil. — 6 ^u; lat. isthm. 



= 9 u. 



Found in Plankton from Sorvaagsvatn (Vaago). I have only seen 

 triangular forms. 



197. S. cuspidatum Bréb. 

 Ralfs Brit. Desm. tab. 21, fig. 1. 



Gliversrejn near Thorshavn (Str.); Skopen (Sand 6). 



198. S. jaculiferum West. Plate VIII, fig. 1. 

 Freshwater-AIgæ of West Ireland p. 172, tab. 22, fig. 14. Of all the 



forms that are closely related to this species the Færoese specimens 

 seems to be nearest to it. They only differ from it in the spines 

 being somewhat shorter. While West only mentions having seen 

 triangular forms, I have also found 2—4 sided specimens. 



Formå 3—4 gona: Long. = 30 fi; lat. sine acul. — 22 fi; lat. 

 isthm. — 8 ju; long. acul. — 22 yw. 



