. Animate creation : popular edition of "Our living world" : a natural history. Zoology; Zoology. ?1 FOND-SNAIL—ii»»«<EOatagnalis. (Natural size.) In the accompanying illustration the common Pond-snail, or LurN^A, is shown in the act of climbing up the stem of a water-plant. In all the members of this family the shell is thin, and sufficiently capacious to con- tain the entire animal when it desires to -R-ithdraw itself into its home. Tlie aperture is simply rounded, without -—:=--T~Tr-TT--™n-v^-4, notches or ridges, and the lip is sharp. In the water-glass of the illustra- tion w
. Animate creation : popular edition of "Our living world" : a natural history. Zoology; Zoology. ?1 FOND-SNAIL—ii»»«<EOatagnalis. (Natural size.) In the accompanying illustration the common Pond-snail, or LurN^A, is shown in the act of climbing up the stem of a water-plant. In all the members of this family the shell is thin, and sufficiently capacious to con- tain the entire animal when it desires to -R-ithdraw itself into its home. Tlie aperture is simply rounded, without -—:=--T~Tr-TT--™n-v^-4, notches or ridges, and the lip is sharp. In the water-glass of the illustra- tion will be observed the pond-snail, an equally common European shell, called from its flattened whorls the Planokbis. In this animal, the foot is short and round ; the tentacles are long, slender, and leave the edges at their inner bases. Both this and the preceding species are in the habit of burying themselves in the mud during a drought, and there passing a semi-toii^id existence. A very remarkable species, called, fi'om its peculiar shape, the Fresh- water or River Limpet {Ancylus la- ciistris), is found in various parts of America, Madeira, and some poitions of Europe. It inhabits swiftly running streams, and is mostly seen attached to stony and aquatic plants. Although the shell is so limpet-like, the animal does not partake of the resemblance, being very like that of the pond-SDail, and having triangiilar tentacles with the eyes at their bases. The generic term, Ancylus, is of Greek origin, and signi- fies a small round shield or target. The little elongated Pouch-shell, a species of a rather small genus, extending over the greater part of the globe, is thin, spu-al, polished, and the anerture is rounded in front. In Vol. PLANORBIS.—PtoKOT-fiJs comem. (Natural size.). 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
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Keywords: ., bookauthorbr, bookcentury1800, bookdecade1890, booksubjectzoology
