15 Microscope Slides:1(d). Chiton sp., t.s. of body,2(e). Anodonta, mussel, t.s. of body,3(d). Mya arenaria, clam, t.s. and l.s. of gills with ciliated epithelium4(d). Mussel, t.s. of siphonal tube,5(d). Mya arenaria, clam, adductor muscle of shell, l.s.,6(e). Pecten, t.s. of mantle margin showing primitive eye,7(e). Anodonta, glochidia (larvae) w.m.,8(d). Snail, typical t.s. of small specimen for general study,9(c). Helix, snail, t.s. of lung cavity,10(c). Helix, snail, t.s. of digestive gland (liver),11(c). Helix, snail, t.s. of kidney,12(d). Helix, snail, t.s. of hermaphrodite gland,13(f). Helix, snail, l.s. of tentacle showing lens eye,14(f). Alloteuthis, young cuttlefish, l.s.,15(d). Octopus, cuttlefish, section through sucking tube.
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