. Animal life as affected by the natural conditions of existence. Animal ecology. 300 THE INFLUENCE OF IKANIJIATE SURROUNDINGS. but the species of Lymnceri, Plano7-his, Physa, and Succinea, which also live in fresh water (see fig. 78), have no such pro- tection, and the month of the shell is remarkably large. Research has shown that, as a fact, operculated snails resist injurioixs influences far more successfully than those without an operculum. According to this the species of the inoperculated fresh-water univalves ought to exhibit a much sharper differen- tiation into separate species accor
. Animal life as affected by the natural conditions of existence. Animal ecology. 300 THE INFLUENCE OF IKANIJIATE SURROUNDINGS. but the species of Lymnceri, Plano7-his, Physa, and Succinea, which also live in fresh water (see fig. 78), have no such pro- tection, and the month of the shell is remarkably large. Research has shown that, as a fact, operculated snails resist injurioixs influences far more successfully than those without an operculum. According to this the species of the inoperculated fresh-water univalves ought to exhibit a much sharper differen- tiation into separate species according to their habitat than the. f-. 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 Semper, C. (Carl), 1832-1893. New York, D. Appleton
Size: 1775px × 1407px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublishernewyo, bookyear1881
