335 



178 (f). V. striatula Wahlenb. 



Among Ihe above iii the sea, also on pcbbles. 



The names halophila, microspora, vitricola, etc. are quite siiper- 

 fluous for this type. 



The types 176 — 178 are more particularly marine. Most of the 

 material is collected by Mr. Borgesen in the neighl)ourhood of 

 Thorshavn. On the boulders on the calmer Danish shores of the 

 Baltic there is a naked zone extending from the ordinary level of 

 the sea to a height of 30 centim., and then there usually follows 

 a very regular zone of V. inaura of equal height; but on the open 

 shores of the Færoes, where the Miaves dash over the rocks to a 

 height of 10 metres or more, the spray rising miich higher, Mr. 

 Borgesen has foiind both V. maiira and green algæ at and above 

 the height to which the spray dashes. 



179. V. epigaea Ach. 



Ostero: Næs (R.). 



180. Sagedia pyrenophora (Ach.), S. Spriicei Rostr. p. 104. 

 On rocks by the shore. Sku 6 (R.). 



181 (a). S. grandis Koerb. 

 S trom 6: Thorshavn (R.). 



182 (b). S. chiorotica (Ach.). 



On rocks. S trom 6: Varden (R.); Sy de ro: Vaag Ejde (!). 



183 (c). S. lectissima (Fr.). 



On rocks. Xolso (^!j; S yde ro: Famien f.). 



The specimens of the above-mentioned S. chiorotica from Sy- 

 dero come near lectissima. 



184. Polyblastia umbrina var. clopima (Wahlenb.). 



Spores 1 — 3, 25 — 45 /y. 



On rocks Ijy tlie shore. Sku 6 (R.); Stromo: I\irkeb6 (!); Sydero: 

 Kvalbo, Famien (!). 



185. P. theleodes (Sommerf.). 



On rocks. Nolso (R.); Stromo: Thorshavn and Kirkebo (R.); 

 Sydero: Ornefjæld {!), Trangisvaag (!). 



186. P. terrestris Th. Fr. 



On the ground and on pebbles; common according to Rostrup. 

 Nolso !); Videro: Malinstjæld !). 



187. P. Helvetica Th. Fr. 



Stromo: Gliversrejn (R.), determined by Th. Fries. 



