180 KAARE MÜNSTER STRØM. 



Genus Staurastrum. Meyen em. Ralfs 1845. 



203. Staurastrum brevispinum. Breb. 

 Rare. 



204. Staurastrum orbiculare. Ralfs. 

 Typical forms of this species were very rare. 



204 a. var. Ralfsii. W. & G. S. West. 

 General, but somewhat scarce. 



205. Staurastrum alternans. Breb. 

 Rare. 



205 a. var. pulchrum. Wille. 



In a single sample from 3400 feet, associated with Gylindro- 

 cystis Brebissonii. 



206. Staurastrum dilatatum. Ehrbg. 

 General, but somewhat scarce. 



207. Staurastrum punctulatum. Breb. 

 General, and often in abundance. 



207 a. var. Kjellmani. Wille. 

 Almost as common as the type. 



208. Staurastrum pygmœum. Breb. 

 Somewhat rare. 



209. Staurastrum granulosum. (Ehrbg.) Ralfs. 

 Quite general, but never in abundance. 



210. Staurastrum Dickiei. Ralfs. 

 Not common. 



211. Staurastrum dejectum. Breb. 

 Somewhat scarce. 



211 a. var. inflatum. W. West. 

 Rare. 



212. Staurastrum cuspidatum. Breb. 

 General, and often in quantity. 



213. Staurastrum aristiferum. Ralfs. 

 Rare, only in a single sample. 



214. Staurastrum lunatum. Ralfs. 

 Very rare, only in a single sample. 



