. The conchology of Nottingham; or, A popular history of the recent land and fresh water Mollusca found in the neighborhood;. Mollusks. 32 Neritid^. The curious family of Neritidas is almost exclusively a tropical fresh-water, or marine shell. England, how- ever, possesses one solitary branch, the Neritina fluvia- tilis. The shell is of considerable thickness and strength, and is the most solid of all the British mollusca. The animal is possessed of an operculum. Neritina fluviatilis (The River Neritine) Linncsus. Figures 12 and Generally an inhabitant of slow rivers, but occasion, ally,
. The conchology of Nottingham; or, A popular history of the recent land and fresh water Mollusca found in the neighborhood;. Mollusks. 32 Neritid^. The curious family of Neritidas is almost exclusively a tropical fresh-water, or marine shell. England, how- ever, possesses one solitary branch, the Neritina fluvia- tilis. The shell is of considerable thickness and strength, and is the most solid of all the British mollusca. The animal is possessed of an operculum. Neritina fluviatilis (The River Neritine) Linncsus. Figures 12 and Generally an inhabitant of slow rivers, but occasion, ally, although not frequently, to be found in lakes and canals. The River Neritine is to be met with adhering to stones, and less frequently to other shells, more especially to the valves of dead ones, yet sometimes to those of living mollusca. I have found them on live specimens of Dreissena polymorpha and Paludina vivipora, and on valves of dead AnodontJi cygnea and Unio pictorum. This species is gregarious, stones being discovered completely covered over with them. In winter they abandon these stones, and in all probability lie dor- mant, with closed opercula, in the mud or gravel at the bottom of the water. Neritina fluviatilis is rather a difficult shell to des- cribe in plain terms, the illustrations giving a much clearer idea than any lengthened description ; it has therefore been considered more advisable to refer the. 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. ]
Size: 1341px × 1862px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectmollusks, bookyear185
