THE AÉRIAL ALGÆ OF ICELAND 335 



112. On earlh in n stone fence round a potato field; Hafrafcll ^/y. 

 (Prasiola crispa, Cymbella incerta v. naviculacea, Diatomella Bal- 



fouriana, Diploneis ovalis, Epitheniia Zebra v. porcellus, Eiinotia præ- 

 riipta f. curta, (iomphonema angiistaUim, Navicnla miitica f. Cohnii, N. m. f. 

 minima, N. m. f. rhomboidea, Nitzschia aniphibia, Pinnularia borealis). 



113. On stones in a fence; Hafrafell Vt. 



(Prasiola furfuracea, Cymbella aequalis, C. ventricosa, Diatomella 

 Balfouriana, Fragilaria virescens, Gomphonema angustatum v. prodiictum, 

 Melosira crenulata. Xavicula mutica f. (>ohnii, Nitzscbia t'onticola, N. Palea, 

 Pinnularia borealis, P. intermedia, Uhopalodia gibberula). 



114. On earfli at the base of a fence; Hafrafell -/?. 



(Prasiola crispa, Cymbella incerta v. naviculacea, C. naviculiformis, 

 C. ventricosa, Diatomella Balfouriana, Melosira crenulata, Navicnla Alomns, 

 N. mntica /'. Cohnii, X. m. f. minima, Pinnularia borealis, P. subcapitata). 



121. On tbe ground near a house; Sej'fiisfjoråur Vt. 



(Prasiola crispa, Hantzschia amphioxys f. xerophila, Navicnla Atomus, 

 N. Borrichii v. subcapitata, N. mutica f. Cohnii, N. ni. f. minima, Nitzschia 

 communis v. abbreviata, Pinnularia borealis, P. intermedia). 



122: Mosses on rock with trickling water; Vestdalur Vt- 

 (Desmidiaceae, Achnanthes Biasolettiana?, A. lanceolata, Anomoeoneis 

 brachysira, Caloneis fasciata, Cymbella æqualis, C. gracilis, C. ventricosa, 

 Diatoma hiemalis, Diatomella Balfouriana, Diploneis ovalis v. oblongella, 

 Epithemia Zebra, E. Argus, Eunotia lunaris, E. prærupta f. curta, E. p. f. 

 bigibba, E. pectinalis f. minor, Gomphonema parvulum, G. subclavatum, 

 Hantzschia amphioxys, Navicula cocconeiformis, N. gracilis v. schizone- 

 moides, N. perpusilla, N. Botæana, Nitzschia sinuata, Pinnularia borealis, 

 P. gracillima, P. viridis, Bhopalodia gibba , B. ventricosa, B. rupestris, 

 B. gracilis, B. gibberula (Diatoms partim det. E. Østrup)). 



123. Moss on the ground; Vestdalur at an attitude of about 80 m. ^/t. 



(Mesotænium sp., Schizothrix PYiesii, Achnanthes marginulata, Ano- 

 moeoneis brachysira, Cymbella gracilis, Eunotia exigua, E. paludosa, 

 E. prærupta f. curta. E. p. v. muscicola, E. p. v. tetraodon, Fragilaria 

 virescens, Frustulia vulgaris, Gomphonema angustatum v. productum, 

 Melosira granulata, Navicula contenta. N. perpusilla, N. Botæana, Pinnu- 

 laria appendiculata, P. borealis, P. muscicola, P. subcapitata, Stauroneis 

 anceps). 



124. Moss-layers on stones in dry bed of streamlet; Vestdalur ^/t. 

 (x\chnanthes marginulata, Cymbella ventricosa, Diatomella Balfouriana, 



Eunotia paludosa, E. prærupta v. muscicola, Navicula anglica v. minuta, 

 N. cryptocephala v. angusta, N. perpusilla, Pinnularia gracillima, P. viridis 

 V. commutata, Bhopalodia gibberula). 



125. Naked ground by the roadside in Vestdalur */?. 

 (Anomoeoneis brachysira, Achnanthes marginulata, Caloneis Silicula 



V. minuta, Cymbella incerta, Eunotia gracilis, Frustulia vulgaris, Gom- 

 phonema angustatum v. productum, Navicula cocconeiformis, N. falai- 



