284 MISS SARAH M. BAKER ON THE 
being formed from the lower parts of the thallus. It bore oblong vesicles 
occasionally, but they were never numerous. A few luxuriant specimens 
were found fruiting in July 1910. 
In the autumn of 1910 Prof. F. W. Oliver found a luxuriant growth of this 
Fucus, associated with Spartina Townsendii, on a salt marsh behind the Hurst 
Castle shingle-bank near Southampton. The plant was similar to the 
Blakeney plant, but reached much more luxuriant proportions. The plants 
Fic. 5. 
A. Habit of Fucus volubilis from Blakeney Point growing with Aster Tripolium. Nat. size. 
B. Fucus as growing with Salicornia europea, probably a smaller variety of F. volubilis, but 
possibly F. lutarius. X 13. 
from Hurst Castle fell naturally into three groups. One, light brown in 
colour, with many vesicles, arranged as in the specimen figured (text-fig. 6), 
the thallus being about 20 cm. long and 3 mm. broad. A second group of 
plants were very spiral, pale yellow in colour, the edge of the thallus being 
beset with cryptostomata, without vesicles, or with very occasional ones : 
length of thallus 13 cm., breadth 2 mm. In the third group the plants 
were less spiral, vesicles very sparse, rhachis bare a long way up : length of 
