Tribe II
NOSTOCHINE.
Individuals numerous, globular or filiform, suspended in a gelatine of a definite form. 2265. Palmella. Minute or small, somewhat diaphanous gelatinous plants, filled with solitary granules unmixed with filaments. 2266. Echinella. A roundish gelatine crammed with elliptical radiant corpuscles. Marshy. 2267. Alcyonidium. A spongy fleshy lobed frond filled with granules. Marine. 2268. Nostoc. Plants roundish or shapeless, gelatinous. Substance composed of curved moniliform simple filaments, lying irregularly in a gelatinous nidus. 2269. Corynephora. A gelatinous roundish puckered frond filled with jointed filaments, bearing here and there clavate processes. 2270. Rivularia. A gelatinous subglobose frond filled with filaments, radiating from a common centre, continuous, placed on a globule, and marked with annulations inside. 2271. Chatophora. Plant elongated or globose gelatinous. Substance composed of branched articulated filaments. 2272. Scythymenia. A coriaceous tough stratum, formed of fibres and granules mingled together.