. Breviora. 1971 CERION FROM INDIAN SHELL-HEAPS 19 and modern local populations for the same character. Table 2 presents for shell height of the three midden samples and a mean value for 69 modern local populations (Gould, unpub- lished data for monograph in preparation; N = 20 for all samples, midden and modern; values for midden shells are estimates for actual height with decapitated apical whorls restored; all shells are adults with completed growth). All midden means are above the modern grand mean. Rooi Rincon and Tafelberg are within the span of modern 's ( to ), but,
. Breviora. 1971 CERION FROM INDIAN SHELL-HEAPS 19 and modern local populations for the same character. Table 2 presents for shell height of the three midden samples and a mean value for 69 modern local populations (Gould, unpub- lished data for monograph in preparation; N = 20 for all samples, midden and modern; values for midden shells are estimates for actual height with decapitated apical whorls restored; all shells are adults with completed growth). All midden means are above the modern grand mean. Rooi Rincon and Tafelberg are within the span of modern 's ( to ), but, at , shells from Kintjan are far more variable than those of any modern local population. The striking feature of midden samples is the large size of some of their shells. Fortunately, Cerion iiva is among the world's best known land snails from a biometrical point of view. Three major studies have been done in this century: by Baker in the earlv 1920's (Baker, 1924), by Hummelinck in the late 1930's (Hum'- mehnck, 1940) and by myself during the past two years. Table 2 compares the heights of shells in midden and modern samples. Each modern study has uncovered a local population with greater mean height than the smallest midden sample, and one of Hum- melinck's local populations exceeds the largest midden sample in mean height. Still, of course, the midden means are all well above T^'*'. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University
Size: 1657px × 1508px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversitymuseumofcomparative, bookcentury1900
