. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 12. Part of the edge of a hole in the shell repaired by new material con- tinued in under the old shell. The new material is covered by a layer of spherulites where not soldered to the under face of the old FIG. 13. The old shell above was the broken edge of the lip. The new shell lies on a lower level and extends under the old. Each has complete normal layers. There is no spherulitic layer. The junction lacks normal organization. To conclude: as the methods of repair of the shell of a Cuban land snail taken at
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 12. Part of the edge of a hole in the shell repaired by new material con- tinued in under the old shell. The new material is covered by a layer of spherulites where not soldered to the under face of the old FIG. 13. The old shell above was the broken edge of the lip. The new shell lies on a lower level and extends under the old. Each has complete normal layers. There is no spherulitic layer. The junction lacks normal organization. To conclude: as the methods of repair of the shell of a Cuban land snail taken at random agree with those of certain land, fresh-water, and marine snails of Europe, we may generalize that the methods of shell repair in gastropods may be either by " atypical " growth, where no cuticle is formed, and lime secreted as a sort of cement crystallizes as a covering of spherulites beneath which lower shell layers may be added; or by " typical " growth where a cuticle is secreted and repair is. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
