A Plain and Easy Account of the Land and Freshwater Mollusks of Great Britain |
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Page 55
... umbilicus represented by a narrow slit behind the inner lip ; the operculum horny , rather thick . Length an inch and a half , and one inch broad . The body is a dark grey , or brown speckled with yellow . The young shells are sometimes ...
... umbilicus represented by a narrow slit behind the inner lip ; the operculum horny , rather thick . Length an inch and a half , and one inch broad . The body is a dark grey , or brown speckled with yellow . The young shells are sometimes ...
Page 56
... umbilicus more distinct . is usually somewhat larger . It This species is generally associated with the last , but is not of such frequent occurrence . The shells of this species collected from a pond on Hampstead Heath , London , have ...
... umbilicus more distinct . is usually somewhat larger . It This species is generally associated with the last , but is not of such frequent occurrence . The shells of this species collected from a pond on Hampstead Heath , London , have ...
Page 57
... umbilicus . Shell half - inch long , three - tenths wide . The animal is blackish , speckled with golden - yellow dots ; the foot is lobed in front , narrow and rounded behind ; the ten- tacles long and slender ; eyes black , large ...
... umbilicus . Shell half - inch long , three - tenths wide . The animal is blackish , speckled with golden - yellow dots ; the foot is lobed in front , narrow and rounded behind ; the ten- tacles long and slender ; eyes black , large ...
Page 58
... umbilicus . Length one- fourth of an inch , and as much broad . shell is very variable in the degree of elevation of the spire , and consequently in its diameter relatively to its height . The lingual ribbon of V. piscinalis is long ; น ...
... umbilicus . Length one- fourth of an inch , and as much broad . shell is very variable in the degree of elevation of the spire , and consequently in its diameter relatively to its height . The lingual ribbon of V. piscinalis is long ; น ...
Page 63
... length ; the whorls are five in number ; the suture is slightly im- pressed ; there is no umbilicus ; the aperture is ovate ; the operculum is horny , ovate , and of a black - brown colour . The teeth are seven in UNIVALVES . 63.
... length ; the whorls are five in number ; the suture is slightly im- pressed ; there is no umbilicus ; the aperture is ovate ; the operculum is horny , ovate , and of a black - brown colour . The teeth are seven in UNIVALVES . 63.
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A Plain and Easy Account of the Land and Fresh-Water Mollusks of Great ... Ralph Tate No preview available - 2015 |
Common terms and phrases
abundant Ancylus animal aperture Arion aspersa bands bivalves body Britain British species brown Bulimus central tooth Clausilia cloth Coil Shell colour columella convex Copford Cyclas cylindrical damp decaying dental formula deposits diameter distinguished distributed ditches eggs elongated England Eocene epidermis epiphragm Fcap foot fossilized frequently fresh-water gardens genus globular glossy grass Helicella Helicidae Helix horny Illustrated inch inhabits Ireland J. G. Jeffreys keel lakes Lankester last whorl length Limax lingual ribbon living mantle margin minute mollusk moss mouth mussel narrow nearly nemoralis North number of teeth oblique oblong occurs operculum outer lip oval ovoviviparous peristome places PLANORBIS Plate ponds Pupa rare resembles rivers rocks S. P. Woodward shell side slightly slugs snail specimens spiral spire stones striæ striated surface suture tentacles Testacella thick thin transparent transverse rows trees umbilicus upper variety VERTIGO Vincent Brooks Vitrina woods wrinkled