— 133 — 



basilari unica egredientibus, inferne nudis, deinde ramos oppositos, 

 alternos aut secundos gerentibus, inferiore parte 11— -23 //, superiore 

 autem 7 — 11// crassis. Fila sterilia pilifera. Sporangia obovoidea- 

 ellipsoidea in superiore parte cujusque cellulæ ramorum et supremi 

 axis primarii sessilia, opposita et in ultima cellula terminalia, 

 17—22// longa, 10 — 11 // crassa. 



I found the lamina of a few specimens of Alaria esculenta almost 

 totally covered with this alga. Sometimes I have seen that two branches 

 or sporangia in the same heighth on the bearing axis are not opposite, 

 but unilaterally placed side by side. The cells nearest the base are 

 24 — 56// long and 2—3 times longer than broad, in the middle 58 — 72 // 



b 



Fig. 1. Chantransia Alarice. 



a A young plant 380: 1. — b A plant with sporangia 138: 1. 

 c Two filaments with short hairs (1 -\- F. Zeiss). 



long and 4 — 5 times longer than broad, and above 20 — 50// long and 

 3 — 6 times longer than broad. The upper end of the cells, especially 

 in the branches, is broader than the lower end. In the young cells, 

 especially the young tetrasporangia , a distinct star-shaped chromatophore, 

 as in the above mentioned species, may be observed. 



The only species of Chantransia with one basal cell, hitherto known, 

 is G. microscopica (Naeg.) Fosl., described in the year 1860 by Naegeli 

 in „Morphologie und Systematik der Ceramiaceen" , but in the Deuxième 

 Mém. s. 1. Alg. d. Groenl., published in 1898, L. K. Rosen vinge 

 decribes a new variety, var. collopoda, of G. microscopica. 



Of all the Chantransia species I know, the G. Alariæ most resembles 



