— 200 — 



adultiora, observatur in apice fragmentum breve costa; folii praete- 

 riti anni". From this it is clear that Areschoug was of the 

 opinion that the plants lose the laminae in the autumn and get 

 new ones during the winter. 



In his "Handbok i Skandinaviens Hafsalgflora" I. Fucoideae, 

 Stockholm 1880 Kjellman writes p. 20 about this matter: „skot- 

 tets bladlika del falles mot hosten, utvecklingen af det nya sker 

 tidigt pa varen". Here a regular shedding of the lamina is very 

 clearly indicated. 



Also in Wille's "Beitrage zur physiologischen Anatomie der 

 Laminariaceen" we read p. 7 : "dieses Endblatt fallt jeden Herbst 

 ab unci wachst von neuem heraus im Laufe des Winters". 



Finally, Reinke in "Studien zur vergleichenden Entwicklungs- 

 geschichte der Laminariaceen", Kiel 1903 p. 39, writes as follows: 

 "Die Pflanze ist perennierend unter Erneuerung der Spreite aus 

 der Basis heraus, worauf schon Harvey in der Phycol. brit. hin- 

 gewiesen hat. Nach Areschoug stirbt im Herbst die ganze Lamina 

 ab, im Februar oder Marz wachst eine neue aus dem Ende des 

 Stiels hervor, die an ihrer Spitze noch ein kurzes Fragment der 

 Mittelrippe der Spreite des Vorjahres tragi. In gleichem Sinne aus- 

 sert sich Wille". 



In contradiction to this Phillips so long ago as 18% in a 

 short "Note on Saccorhiza hulbosa J. G. Ag. and Alaria esculenta 

 Grev." (Annals of Botany, Vol. 10, p. 97) mentioned "that an inter- 

 calary growth takes place in Alaria in the same region as in the 

 Laminarias. This appearance however persists throughout the 

 year and I have not seen any evidence of a similar insertion of 

 an entirely new lamina in the spring as occurs in L. digitata and 

 saccharina. The intercalary growth in Alaria seems to be conti- 

 nuous; in Laminaria periodic". 



In my treatise on the marine Alg?e of the Faeroes, (Botany 

 of the Faeroes, Part II, 1902), without knowing Mr. Phillips' note, 

 I have maintained the same view regarding this problem. After 

 having quoted the above-named statement by Wille I write: 

 "but I do not think that this is always so, as at any rate along 

 the Faeroes I never came across specimens which showed the 

 slightest indication of a regular change of leaves as is the case, 

 e.g. in most of the Lammana-species. My own observations 

 lead me to think that the leaf keeps on growing at its 

 base during the greater part of the year, while the 



