164 



H. JONSSON 



South Iceland. 



Vestmannaeyjar, much exposed, 



steep, rocky coast. 20 /5. 

 I. Ulothricetum U. flaccae. 

 II. Porphyretum P. umbilicalis. 



III. Ascophylletum A. nodosi. 



IV. Gigartinetum G. mamillosae, 

 broad belt, in it Corallina offici- 

 nalis, Ceraraium acanthonotum, 

 Gallithamnion, Delesseria alata. 



V. Corallinetum G. officinalis, dis- 

 persed in it Laminariae. 



Vestmannaeyjar, Vikin, considerably 

 exposed, sloping rocky coast. 21 /5. 

 I. Ulothricetum U. flaccae. 



Enteromorphetum E.*micrococ- 

 cae. 



Acrosiphonietum . 

 II. The Fucus-belt. 



Ascophyllum nodosum. 

 F. vesiculosus. 



F. inflatus. 



III. Gigartinetum 



G. mamillosae floating 



IV. Corallinetum together. 

 C. officinalis 



V. Laminarietum L. * stenophyllae. 

 VI. Alarietum A. esculentae. 



VII. Laminarietum L. hyperboreae. 



on flat rocks 

 between 

 crevices. 



Vestmannaeyjar, the skerry, 

 considerably exposed, sloping rocky 

 coast almost destitute of phanero- 

 gams. 18 /5. 



Uppermost, Gochlearia officinalis and 

 rosettes of Plantago maritima. 

 At the same level, in crevices: 

 I. Enteromorphetum E.* micrococ- 



cae, 4- Cladophora sericea. 

 II. Ulothricetum 

 U. flaccae 

 Prasioletum 

 P. stipitatae 



III. Pelvetia canaliculata. 



IV. Fucus spiralis. 



V. Ascophylletum A. nodosi. 

 F. vesiculosus. 



F. inflatus. 



Under-veg. Callithamnionetum. 

 Antithamnion. 

 Gigartina. 

 VI. Gigartinetum 



G. mamillosae. 

 VII. Laminarietum 



L. * stenophyllae. 



Under-veg. Phymatolithon po- 



lymorphum. 



South Iceland, sou 

 according to C. H. 



Stadur, wide foreshore, 

 considerably exposed. 12 /6. 



1. Pelvetia canaliculata. 



-r stunted F. vesiculosus. 



2. Fucus spiralis, with stunted 

 Ascophyllum and 

 Cladophora rupestris. 



3.a Ascophyllum + Polysiphonia fa- 



stigiata, broad belt. 

 3.b Fucus vesiculosus formation, 



in it F. inflatus, widely distributed, 

 3.c in it Gigartina. 

 4. Here and there in depressions 



the formations: 



Monostroma Grevillei and 



M. fuscum. 



th side of Reykjanes, 

 Ost en f eld's diary. 



4- Halosaccion. 

 Cystoclonium. 

 Ahnfeltia. 



Dictyosiphon foeniculaceum. 

 Rhod3 T menia. 

 5. Laminaria + Alaria. 



The foreshore between StacHir and 

 Reykjanes. 13 /e. 



1. Uppermost, Porphyra umbili- 

 calis. 



F. spiralis. 



F. vesiculosus f. sphaerocarpa. 



Enteromorpha compressa. 



2. F. inflatus-formation, widely dis- 

 tributed and in it Gigartina. 



