Phycologia britannica, or, A History of British sea-weeds, containing coloured figures, generic and specific characters, synonymes, and descriptions of all the species of algae inhabiting the shores of the British Islands . specimens here figured having been obtained from the same salt-water ditches which have already supplied us—through the kind-ness of Mr. Thwaites,—with several interesting subjects, I havethought that there could be no objection to giving a figure of a f 2 plant interesting by its structure and beauty, and so closelyallied to the Spharozygce, which have already appeared. Mo


Phycologia britannica, or, A History of British sea-weeds, containing coloured figures, generic and specific characters, synonymes, and descriptions of all the species of algae inhabiting the shores of the British Islands . specimens here figured having been obtained from the same salt-water ditches which have already supplied us—through the kind-ness of Mr. Thwaites,—with several interesting subjects, I havethought that there could be no objection to giving a figure of a f 2 plant interesting by its structure and beauty, and so closelyallied to the Spharozygce, which have already appeared. Monor-mia seems to differ from Sphcerozyga chiefly in possessing agelatinous branching matrix, so loose in structure that it canhardly be called a frond, surrounding the spirally-twisted fila-ment. This filament is of indefinite length, having many con-necting cells: the filaments of the Spharozyga, on the contrary,are generally short, with seldom more than one or two connectingcells. The fructification in both appears formed on the sametype. Fig. 1. Stratum of Monormia intricata as it appears to the eye. 2. Part of abranching frond:—magnified. 3. Portion of the filament from the same:—very highly magnified. A.


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Keywords: ., bookauthorharveywilliamhwilliam, bookcentury1800, bookdecade1840