Elementary text-book of zoology (1884) Elementary text-book of zoology elementarytextbo0101clau Year: 1884 VOLVOCINID^—ASTASIAD,*;. 195 In their whole developmental cycle they agree very closely with uni. cellular algte and fungi; still the analogy to the developmental processes of many Infusoria, Atnpliileptus, is not to be passed over. Spwmella vulgaris (termo Ehrbg.) of Cienkowski shows a somewhat different development and cyst formation; it receives solid food (by aid of the food vacuoles) and is fixed by a fibre, as also Ckromulina nebulosa Cnk., and Ochracea Ehrbg. A second group nearly
Elementary text-book of zoology (1884) Elementary text-book of zoology elementarytextbo0101clau Year: 1884 VOLVOCINID^—ASTASIAD,*;. 195 In their whole developmental cycle they agree very closely with uni. cellular algte and fungi; still the analogy to the developmental processes of many Infusoria, Atnpliileptus, is not to be passed over. Spwmella vulgaris (termo Ehrbg.) of Cienkowski shows a somewhat different development and cyst formation; it receives solid food (by aid of the food vacuoles) and is fixed by a fibre, as also Ckromulina nebulosa Cnk., and Ochracea Ehrbg. A second group nearly allied to the Algre (Protococcacea) is that of the Volvocinidce. These organisms consist of colonies of cells united by a common gelatinous substance, and the following characteristics indicate their close relationship to the Algse:—(1) in the inactive stage they possess a cellulose membrane; (2) they exhale oxygen; (3) they possess an abundance of chlorophyll and of vegetable red or brown coloured oils.
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