Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 891
erone form or the other, theyare wanting in but few ofthe genera belonging tothis order ; and their pre-sence or absence furnishesvaluable characters for thediscrimination of species.Each avicularium has two mandibles/ of which oneis fixed, like the upper jawof a bird, the other mov-able, like its… … Fig. 681.—A, portion of BiceUaria ciliata, en-larged ; B, one of the birds-head processes ofBugula avicularia, more highly magnified, andseen in the act of grasping another. tactile organ, being brought forwards when the mouth is open, so 1 For a more detailed account of the structure and…
Microscopy
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