. The conchology of Nottingham; or, A popular history of the recent land and fresh water Mollusca found in the neighborhood;. Mollusks. 134 Planorbis spirorbis [The Rolled Coil Shell}. Miiller. Figures 97 and Described by Dr. Pulteney, about 1790, in his Cata- logue of Dorsetshire Shells. Bears a strong resemblance to Planorbis vortex, so much so that much confusion occurs when the distinc- tive differences are not known. The two discs are con- cave, semi-transparent, but often coated with a black incrustation. Body whorl not much larger than the preceding one. There are six convolutions.
. The conchology of Nottingham; or, A popular history of the recent land and fresh water Mollusca found in the neighborhood;. Mollusks. 134 Planorbis spirorbis [The Rolled Coil Shell}. Miiller. Figures 97 and Described by Dr. Pulteney, about 1790, in his Cata- logue of Dorsetshire Shells. Bears a strong resemblance to Planorbis vortex, so much so that much confusion occurs when the distinc- tive differences are not known. The two discs are con- cave, semi-transparent, but often coated with a black incrustation. Body whorl not much larger than the preceding one. There are six convolutions. Not so thin as Plauorbis vortex. The form of the aperture is so marked a feature that it can at once be recognised from Planorbis vortex, it is almost round. Usual diameter a quarter of an inch. Specimens have been obtained here four lines in diameter. I^iome writers on British conchology describe it as a widely spread abundant species, even more so than Planorbis vortex. In this county it seems anything but abundant. Inhabits ponds, canals, ditches and marshes. Our localities are—a dilch below the Railway Sta- tion at Beeston, a wet meadow at Stanton-onthe- Wolds, and the bogs at Bulwell. More distantly at Bristol (Miller), Wiltshire (Mon- tagu), Essex (Sheppard), London (Grey), Norwich (^Bridgman), River Eylhrope, at Stone, Buckingham- shire (Reade), Kendal^ one locality (Gough), Newcastle (Alder). In Ireland, widely (Thompson), Scot-. 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 Lowe, E. J. (Edward Joseph), 1825-1900. London, C. A. Bartlett; [etc. , etc. ]
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectmollusks, bookyear185
