. Cassell's natural history. Animals; Animal behavior. NATVSAL HISrORl his scoop, and then monkl and smoothen it with his ; Tliese organs, described above, receivp the pellets of mud which the animal mixes up " with an adhesive secretion, furnished probably by the collar of the cephalic segment, and by the organs just mentioned. It is thus rendered consistent and tenacious, and tit to be employed in raising the edge of the tube. To that position the material is raised by the tongue and trowels, aided by a general elevation of the head ; and it is fashioned into shape by the sa
. Cassell's natural history. Animals; Animal behavior. NATVSAL HISrORl his scoop, and then monkl and smoothen it with his ; Tliese organs, described above, receivp the pellets of mud which the animal mixes up " with an adhesive secretion, furnished probably by the collar of the cephalic segment, and by the organs just mentioned. It is thus rendered consistent and tenacious, and tit to be employed in raising the edge of the tube. To that position the material is raised by the tongue and trowels, aided by a general elevation of the head ; and it is fashioned into shape by the same scoop and trowels, curved over the exterior circumference as far as they can be stretched, and smoothed and polished by their motions, while clasping it with their pressure ; and thus the tube is built ; When clear and perfect, says Dalyell, this tube bears the narrowest resemblance to a tube of caoutchouc manufactured by human art. The branchial plumes are the most striking part of the structure of this worm, and ah enumera- tion of their parts may well till us with wonder and admiration. "If the plume of an adult," says. ^ Sir John Dalyell, "displays eighty branchite, " ^ â w ith five hundred cilia on each side, here are no less than forty thousand organs endowed with \ oluntary, distinct, and independent action. 80 many other parts are alike privileged in their own peculiar motion without the participation of the rest, that it is no exaggeration to affirm that the will of this timid, lowly, defenceless creature is fulfilled through the control of fifty thousand living ; None of the Annelids, we are told l\v those who have studied the history of this interesting worm, is more richly endowed with the powei of repairing wounds and losses. One of the Sabellinse is j-emarkable for the fewness of its segmentsâthe same number as in caterpillarsâand the presence of eye-spots on the front and also on the tail segment. The species Orfhonia
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecta, booksubjectanimals
