79 
into spores, being provided with a thick firm wail, of a much denser consistency 
than the gelatinous wall of the vegetative filaments. The akinetes are only sur- 
rounded by a thin common membrane, much thinner than the wall of the vege- 
tative cells, and it is thus beyond doubt that the walls of the akinetes have risen 
by transformation of the innermost layers of the original gelatinous wall, and these 
cells thus agree completely with the conception of akinetes by Witte. In some 
cases the akinetes are close together, in others they are separated. They are partly 
ellipsoidal or oblong, partly globular, measuring 8,5 to 10,5 » in transverse diameter, 
up to 15 » in length. In fig. 17 C a free akinete is to be seen and two emptied 
cells which have contained an akinete. As shown in fig. 17 C and D, the formation 
of akinetes may take place in very small plants. 
As mentioned above, I have no doubt but that the specimens from the Danish 
waters really belong to Asferocytis ramosa, though it seems that the species does 
not attain in these waters the same dimensions as e.g. on the Norwegian coasts. 
The frequently occurring unbranched individuals do not represent a distinct species 
but only a reduced form, f. simplex (Lak.). 
The species has been found with certainty in some places in the Smaaland 
Waters and in the Baltic, but is probably widely distributed in brackish water. I 
have formerly noted it from Holbæk Fjord and from Kertinge Vig, but omitted to 
keep the specimens. It has been found in shallow water near land, fixed on Poly- 
siphonia violacea and nigrescens and Ceramium, only in summer (July to September). 
Localities. Ks: (Holbæk Fjord). — Sb: Kertinge Vig by Kerteminde. — Sm: Kragevig; off 
Petersværft; Guldborgsund, near Vennerslund. — Bh: Rønne, the reef S. of the town. 
B. Floridee. 
ll. Nemalionales. 
J. AGARDH, Species genera et ordines Algarum, Vol. II, pars II, Lundæ 1851—52; Vol. III, 1876. 
E. Borner, Deux Chantransia corymbifera Thuret. Acrochætium et Chantransia. Bull. soc. bot. France, 
tome LI, Sess. extr. 1904 p. XIV—XXIII, pl. I. 
É. Borner et G. THuRET, Recherches sur la fécondation des Floridées. Annales des sc. nat. 5e série, 
VII, 1867. 
— —, Notes algologiques. Fasc. I. Paris 1876. 
F. BORGESEN, Marine Algæ. Botany of the Ferées. Part II. Copenhagen 1902. 
F.S.Corrıns, Acrochaetium and Chantransia in North America. Rhodora, Oct. 1906. 
É. de Janczewskı, Note sur le développement du cystocarpe dans les Floridées. Mémoires de la Soc. d. 
sc. nat. de Cherbourg. Vol. XX. 1877. 
H. KyLin, Zur Kenntnis einiger schwedischer Chantransia-Arten. Botaniska Studier tillagnade F. R. Kjell- 
man. Uppsala 1906 p. 113—126. 
—, Studien über die Algenflora der schwedischen Westküste. Upsala 1907. 
G. Murray and Erne S. Barton, On the Structure and Systematic Position of Chantransia. Journ. Linn. 
Soc. Vol. 28. 1891. 
C. NÄGELı, Beiträge zur Morphologie und Systematik der Ceramiaceae. Sitzungsber. d. Akad. d. Wiss. 
München 1861. p. 401—415. 
