. Civic biology; textbook of problems, local and national, that can be solved only by civic coöperation. Biology. Fig. 130. A common land snail be stndied as an interesting novelty in nii>st American commnnitics. For all we know, nmy not our big, fat garden slugs be food delicacies? Compare garden slugs with marine or fresh-water snails, which they may be seen to resemble, except in respect to the rudimentary shell. These slugs are often as destructive in gardens as any in- sect, and, 1)eing nocturnal, are little known. Collect the eggs (translucent, yellowish, about the size of buckshot, i
. Civic biology; textbook of problems, local and national, that can be solved only by civic coöperation. Biology. Fig. 130. A common land snail be stndied as an interesting novelty in nii>st American commnnitics. For all we know, nmy not our big, fat garden slugs be food delicacies? Compare garden slugs with marine or fresh-water snails, which they may be seen to resemble, except in respect to the rudimentary shell. These slugs are often as destructive in gardens as any in- sect, and, 1)eing nocturnal, are little known. Collect the eggs (translucent, yellowish, about the size of buckshot, in masses of thirty or more, found in damp }>laces nnder boards) and keep them in a glass jar or aquarium to watch their development. If the life history of these pests were better known, we might control them more effec- tively abont our gardens and greenhouses. In connection with other field work, make a collection of common marine, fresh-water, and terrestrial gastroi>ods. Keep them in suitable acpiaria or \ i\aria, to study habits and foods. Note that som<' snails are 'Meft-handepening uj* and spii-c pointing away from you, tlie dextral shells have the opening to the right, tin- sinistral, to tiie left.) The commonest and most interesting arc tin* pond snails, belonging to the genus PJi//s<i, which can be readily distinguished by their sinistral. '51. C'oimuon snails, sinistral and dextral. 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 Hodge, Clifton Fremont, 1859-; Dawson, Jean, 1873-. Boston, Ginn
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