334 DR. SARAH М. BAKER AND MISS М. Н. BOHLING ON 
The small form grows in hummocks with Salicornia europea in the Pelvetia 
zone. It is very close іо the smallest Blackwater Fuci т habit, and it also 
approximates to the larger marsh Fucus, found by Cotton in Ireland. 
Although it has not been found fruiting, and bears no vesicles, it may be 
referred to the same species as these forms, namely, Fucus vesiculosus, L. 
4, The Clew Bay Fuci. 
Cotton, in his * Report on the Clare Island Survey’ (p. 125 & РІ. 6), gives 
an interesting account of the two Fuci found by him, covering large areas 
Ете. 5.— Fucus vesiculosus megecad limicola ecad volubilis, Nat. size. 
Intermediate form showing receptacles and extensive vegetative budding, without 
© 1 с c? 
vesicles. Blackwater Marshes. 
of the peat marshes. Не calls them F. vesiculosus var. balticus, and F. vesi- 
culosus var. muscoides, respectively. Both are very dwarf forms, showing 
practicaily no twisting of the thallus ; but numerous and prominent marginal 
cryptostomata. Neither bears vesicles. The most striking fact about them is 
that both forms, in spite of the minute size of the var. muscoides, occasionally 
bear receptacles which are perfectly developed in miniature, and these 
receptacles are found to be dicecious, both male and female plants having 
been collected. The var. muscoides is connected by intermediates with the 
var. balticus ; which itself approaches very closely to the form of the smallest 
