. An introduction to zoology, with directions for practical work (invertebrates). vii ANNELIDA 85 projecting from the upper end (Fig. 40); these may often be seen on a sandy shore above low tide mark, the upper part only of the tube projecting vertically above the surrounding sand. It is interesting to watch these tubes being formed: the particles are seized by the delicate tentacles of the worm and passed into the mouth, where they are moistened by a secretion, and then placed in position at the margin of the tube by the. B A FlQ. 39.—The Mud Mason {Tereibella {=Leprea) lajoidaria) x J. A, Th
. An introduction to zoology, with directions for practical work (invertebrates). vii ANNELIDA 85 projecting from the upper end (Fig. 40); these may often be seen on a sandy shore above low tide mark, the upper part only of the tube projecting vertically above the surrounding sand. It is interesting to watch these tubes being formed: the particles are seized by the delicate tentacles of the worm and passed into the mouth, where they are moistened by a secretion, and then placed in position at the margin of the tube by the. B A FlQ. 39.—The Mud Mason {Tereibella {=Leprea) lajoidaria) x J. A, The worm retracted within the sandy case of a Pectinaria; J?, worm removed from the case, showing the long tentacles, the three pairs of branched gills, and the parapodia (bristle-stumps) down each side of the body. tentacle, helped by the lower lip of the worm. Terebella (Leprea) lapidaria forms mud tubes which lie horizontally under stones. The Terebella in Fig. 39, having been turned out of its own case, had taken up its abode temporarily in the tube of a Pectinaria, an unusual occurrence. In each species the body may be entirely withdrawn into the tube, but when undisturbed there project from it three pairs of bright-red branched gills, which are attached to some of the. 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 Lulham, Rosalie Blanche Jermaine. London, Macmillan
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Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1913
