286 MISS SARAH M. BAKER ON THE 
to correspond exactly with the plant described by Sauvageau * from Port de 
Boria, San Vicente de la Barquera, N. Spain. They were much larger than 
the Blakeney plants, but of a similar habit (text-fig. 6), varying from 16 ст. 
to about 80 em. in length and 4-8 mm. in breadth. They were usually 
found with numerous vesicles, arranged as in the figure, though occasional 
plants had no vesicles. The figure represents the characteristic appearance 
Fro. 7. 
М, 
NS 
Fucus volubilis, var. flexuosus. X А. 
of old weather-worn plants, showing the great delicacy of the wings of the 
thallus. In the young growing plants the ends of the thallus are perfect, and 
show numerous cryptostomata on the margins and scattered over the tip of 
the frond. 
In May 1911 (since communicating the above) the Mersea Island marshes 
* Sauvageau, in Bordeaux Soc. Sc. Arcachon, Trav. Lab. 1908, pp. 106-153, fig. 16. 
