THE AÉRIAL ALGÆ OF ICELAND 345 



386. On ground in the bed of (ilji'iliirholtsa ^'/s. 



(Vaucheria hamata, Achnanthes microcephala , Caloneis Vaucheriæ, 

 Ceratoneis Arcus, Diatomella Balfouriana. Fragilaria capucina, Gompho- 

 nenia angustalum v. oblusatiim, G. parvulum v. siibellipticum , Xavicula 

 cryptoccphala v. angusta, N. c. v. exilis, Nitzschia (>lausii, N. coninninis, 

 N. Kutziiigiana, N. Palea v. perminuta). 



387. On ground near the fence surrounding the church; Kotstrond ^^/s. 

 (Botrydiopsis arhiza, Botrydium granulatum, Horniidium llaccidum, 



Prasiola crispa, (lomphonema parvulum, Hantzschia amphioxys v. xero- 

 phila, Navicula Atomus, Nitzschia KiUzingiana, Pinnularia borealis\ 



395. At the base of wall, Reykjat'os factory ^^/s. 

 (Chlorella ellipsoidca, Stichococcus bacillaris, Achnanthes hinceolala, 

 Hantzschia amphioxys, Xavicula Atomus). 



Vestmannaeyjar. 



399. Small rocky cave on Heimaey near the landing place on the 

 north side; abt. 20 m above sea level ^^/s. 



(Rhizoclonium lapponicum, Vaucheria synandra, Achnanthes coarc- 

 tata, A. delicatula, A. subsalsa, Caloneis fasciata, Hantzschia amphioyxs, 

 Navicula peregrina v. Meniscus, N. radiosa v. tenella, Nitzschia debilis, 

 Pinnularia intermedia). 



400. On the back of big stone outside rocky cave; abt. 20 m above 

 sea level; Heimaey ^^/s. 



(Desmococcus vulgaris, Trochiscia hirta, Achnanthes coarctata, Navi- 

 cula cincta v. Heufleri, N.contenta, N. mutica f. Cohnii, N. m. f. minima, 

 N. perpusilla, Pinnularia intermedia. 



401. Rocky wall of cave; abt. 20 m above sea level; Heimaey -^/s. 

 (Nostoc sp., Achnanthes coarctata, Hantzschia amphioxys v. genuina, 



Navicula cincta v. Heufleri, N. cincta v. typica, N.contenta, N. peregrina 

 V. Meniscus, N. perpusilla, Nitzschia Kiitzingiana, N. vitrea v. salinarum, 

 Pinnularia intermedia, P. parva v. Lagerstedtii f. interrupta). 



402. Cave; on calcareous sand formed of fragments of Mollusc 

 Shells, Bryozoa etc. ; Heimaej^ ^^/s. 



(Vaucheria sp. sterile). 



403. Cave on Heimaey -^/s. 



(Achnanthes coarctata, A. lanceolata, Navicula cincta, N. cv. Heufleri, 

 N.contenta, N. mutica f. Cohnii, N. pusilla, Nitzschia vitrea v. salinarum, 

 Pinnularia intermedia). 



404. On wood work at northern landing place; Heimaey -^/s. 

 (Pseudendoclonium submarinum). 



405. On stone reached by the salt water in stormy wcathcr; Heim- 

 aey ^^/s. 



(Pseudendoclonium submarinum, Prasiola sp.). 



406. On rocks below bird clifls at hcight of abt. 50 m on rock 

 west of depression by landing place ^Vs. 



(Prasiola furfuracea). 



