. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. General Classijication of the Pelecypoda. 105 There are two apparent objections to Bernard's con- clusions. The first is Noettling's (17, p. 87), who, in criti- cizing Bernard's statement that the dorsal primary laraellaj of the Heterodonta appear later than the ventral ones, says :—" The view that the dorsal primary lamellffi are older than the ventral ones is . . supported by the fact that the Bivalves grow in a ventral direction—in other words, the ventral portions of
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. General Classijication of the Pelecypoda. 105 There are two apparent objections to Bernard's con- clusions. The first is Noettling's (17, p. 87), who, in criti- cizing Bernard's statement that the dorsal primary laraellaj of the Heterodonta appear later than the ventral ones, says :—" The view that the dorsal primary lamellffi are older than the ventral ones is . . supported by the fact that the Bivalves grow in a ventral direction—in other words, the ventral portions of a bivalve shell are younger than the Fig. 9. LMl. LP I LAI. 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 London, Taylor and Francis, Ltd
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