. Bulletin of the British Museum (Natural History). Fig. 50. Actinulae of capitate hydroids. a, Tubularia (redrawn from Pyefinch & Downing, 1949), B, Hybocodon prolifer (redrawn from Uchida, 1927), c, Arum cocksi (Vigurs) (redrawn from Allman, 1875).. Fig. 51. Polyp-buds in capitate hydroids : A, reversed bud in Euphysa aiirata (after Rees, 19376) ; b, ordinary budding in Tricyclusa singularis (Schulze) (redrawn from Oppenheim's sketches in the Zoological Museum, Amsterdam)', c, polyp budding in the hydroid of Sarsia tubulosa (M. Sars) (after Rees, 1941). As regards the Capitata it is reas
. Bulletin of the British Museum (Natural History). Fig. 50. Actinulae of capitate hydroids. a, Tubularia (redrawn from Pyefinch & Downing, 1949), B, Hybocodon prolifer (redrawn from Uchida, 1927), c, Arum cocksi (Vigurs) (redrawn from Allman, 1875).. Fig. 51. Polyp-buds in capitate hydroids : A, reversed bud in Euphysa aiirata (after Rees, 19376) ; b, ordinary budding in Tricyclusa singularis (Schulze) (redrawn from Oppenheim's sketches in the Zoological Museum, Amsterdam)', c, polyp budding in the hydroid of Sarsia tubulosa (M. Sars) (after Rees, 1941). As regards the Capitata it is reasonable to assume that their immediate ancestors already possessed a hydroid and a medusa phase, but the actinula-medusa theory harmonizes more closely with what we already know of their origins. ' By courtesy of Dr. W. S. S. van der Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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