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Report on the zoological collections made in the Indo-Pacific Ocean ...

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SPONGIIDA. 393usually adopted <strong>in</strong> <strong>the</strong> family Chal<strong>in</strong>idae, viz. that by llie externalform, <strong>in</strong> which both Carter and Schmidt agree, 80 l<strong>on</strong>g as, <strong>in</strong> <strong>the</strong>rema<strong>in</strong><strong>in</strong>g features of <strong>the</strong>ir organizati<strong>on</strong>, <strong>the</strong> different members of<strong>the</strong> family did not present any sufficiently dist<strong>in</strong>ctive characters, itwas impossible to do o<strong>the</strong>rwise than arrange <strong>the</strong>m by this character,which, <strong>in</strong>deed, appears to possess, from its approximate c<strong>on</strong>stancy <strong>in</strong><strong>the</strong> species, more importance than <strong>in</strong> some o<strong>the</strong>r families of M<strong>on</strong>act<strong>in</strong>ellida.Now, however, that two mai'kedly dist<strong>in</strong>ct types of tteshspiculeshave been found to occur (cf. <strong>the</strong> ancliorate <strong>in</strong> Homieodlctija(Chal<strong>in</strong>a, Carter) 2^

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