. [Characeae. Characeae. 292 INDIili ORIENTALIS on the side of the leaf opposite to that on which the gall breaks forth, corresponding with the insertion of the stem. Almost every specimen is beset with a minute parasitic fungus, which appears to be undescribed. It may be thus characterized :— Sphseronema epicecidium, n. s. peritheciis minutis innatis nigris ore prominulis; sporidiis variis plus minus obovatis minimis. Tab. X. B. Our plate shews (Fig. 1.) the gall of the natural size, and a magnified view (Fig. 2) as it is infested with the parasite. Pig. 3. the perithecia, as seen f
. [Characeae. Characeae. 292 INDIili ORIENTALIS on the side of the leaf opposite to that on which the gall breaks forth, corresponding with the insertion of the stem. Almost every specimen is beset with a minute parasitic fungus, which appears to be undescribed. It may be thus characterized :— Sphseronema epicecidium, n. s. peritheciis minutis innatis nigris ore prominulis; sporidiis variis plus minus obovatis minimis. Tab. X. B. Our plate shews (Fig. 1.) the gall of the natural size, and a magnified view (Fig. 2) as it is infested with the parasite. Pig. 3. the perithecia, as seen from above, springing from an obscure stratum of flocci, which are more or less confused with the outer cells of the gall, beneath which the larger cells of the subjacent tissue are visible. Fig. 4. spores highly ChARACE^ ORIENTALIS ET INSULARÜM MARIS PACIFICI ; 0?' characters and observations on the Charace^ of the East Indian Continent, Ceylon, Siinda Islands, Marians, and Sandwich Islands; hy Dr. Alexander Braun. The East Indian Characece are far less peculiar than those of Aus- tralia, the greater part of them being found also in other parts of the world, although exhibiting difierent varieties. It is remarkable that several of the East Indian species agree with those of South America and the warmer parts of North America. In treating the single species I shall specify these relations. In this enumeration of the East Indian Characece, the herbarium of Sir W. Hooker has furnished me with the richest materials; but I regret not having found in it the species enu- merated in Dr. WaUich's Catalogue. Other valuable additions were furnished to me by Agardh, Meyen, Bellanger, Perrottet, &c. Some doubts concerning the synonymy cannot yet be cleared up; but I hope that the communication of these remarks will give to others the oppor- tunity of removing them. Genus I. NITELLA. Subgenus A. Nitella. a, Nitella fur cata. d, homophi/lla. 1. N. acuminata, var. Bel
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