Seasonal variation in chemical composition of some of the littoral seaweeds common to scotland. Part II. Fucus serratus. Fucus Vesiculosus. Fucus spiralis and pelvetia canaliculata

In previous communications, 1,2,3 the seasonal variation over a period of two years in the ash, iodine, crude protein, mannitol, laminarin and alginic acid contents of the Laminariaceae common to Scotland, has been reported, while in. a later paper, 4 the variations in the above constituents were given for the common littoral seaweed Ascophyllum nodosum. The work has now been extended to include the other common littoral algae, namely, Fucus serratus, Fucus vesiculosus, Fucus spiralis and Pelvetia canaliculata and the results have been correlated with the depth of immersion of these algae.