254 CARL SKOTTSUERG 



left, support a fine vegetation. Roskwixce (1. c. p. 204) nnd BORGESEN 

 (1. c. ]). 735 — 42) are quite right in giving these locahties a more in- 

 dependent position, because their vegetation hvcs under more subhtto- 

 ral conditions, but nevertheless they have to be described here. 



St. 78 B showed basins and caves covered with a calcareous alga, 

 forming absolutely the most characteristic part of the vegetation. The 

 formations of the calcareous alg^e I here include under the name of 

 the Lit li op Ity I hi Ill-format ion after L. discoidcuiii FOSLIE, the only 

 species left of my collections. On the Lithophylluui grew Iridca cfr. 

 cordata and CladopJiora sp. They had been frozen in during the winter 

 and had just got free. At St. 80 B the zone laid dry at low water time 

 supported an Uha, forming an association belonging to what I will call the 

 littoral formation (jf ChloyopJiycccc. Small spots of a microscopic orga- 

 nism, of a cm. square, according to a preliminary investigation Splue- 

 rella sp., were also ob.served. The waterpools sheltered the same flora 

 as described above. St. 4 showed basins with /.////i?/' //!'//// ///-formation 

 [L. discoidcuiii), associations of Urospora sp. and Moiwstroiiia cndivice- 

 J'olium. A couple of Florideai were noted. As sublittoral products were 

 observed Dcsinarcstia Rossii and UrvillcEa (.?) sp. n. Further 1 found 

 there a quite new alga, seeming to belong to a new genus of Desma- 

 restiacese. The richest littoral vegetation I ever saw there was at st. 

 83 B, where vast shallow basins extended. They contained the common 

 Lithophy Ihn II -form?it\on. The Iridca was very richly developed, more 

 scarcely grew Adcnocystis Lesson ii. Dcsniarestia Harvey ana. Spliacclaria 

 sp., UrvilUea (.') sp., (iracilaria [Lcptosaira] simplex, Plocamium Hookeri. 

 and Ulva sp. At Cape Neyt on LiegeTsland I made some remarkable 

 observations. High up on the cliffs, 10 — 15 m. above sea-leval were 

 some pools with F.iiteromorpha sp. and SpJuerclla sp. The water was 

 very slightly salt. .Sometimes the surf breaks over the rocks and 

 sprinkles fresh sea-water on the poor algai, otherwise the\' could not 

 live there. While examining the rocks I discovered a fact that indi- 

 cates that the rock may sometimes have a decisixe influence upon the 

 distribution of calcareous algai. In a crex'ice in a rock I found a verti- 

 cal dike of some softer rock tra\-ersing the hard (juart/.-diorite. In the 

 tidal region and further down as far as 1 could see, the dike was cox'c- 

 red with a calcareous alga and \er\' sharpl)- marked, because the sur- 

 rounding cjuarz-dioritc was absolutelv free from it. 



