. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 6.— Fretum sororum Clapp. Radula. From any of the preceding species of the genus, this shell is very easily distinguished by its small size. The animal has the posterior dor- sal surface flattened, as in the other species of Fretum. The sole of the foot is tripartite, showing clearly a narrow central area. The radula (Fig. 6, M. C. Z. 32,551, slide 1,633, 1,644) is similar to those of the preceding species, having a formula of 40-6-1-6-40, and containing about 100 rows. The dividing line between the laterals and
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 6.— Fretum sororum Clapp. Radula. From any of the preceding species of the genus, this shell is very easily distinguished by its small size. The animal has the posterior dor- sal surface flattened, as in the other species of Fretum. The sole of the foot is tripartite, showing clearly a narrow central area. The radula (Fig. 6, M. C. Z. 32,551, slide 1,633, 1,644) is similar to those of the preceding species, having a formula of 40-6-1-6-40, and containing about 100 rows. The dividing line between the laterals and the mar- ginals is more distinct than in any of the preceding species of Fretum, the change being unusually abrupt. The reproductive organs, heart, and kidney are shown in (Fig. 7, 8, M. C. Z. 32,551, slide 1642).. Fig. 7.—Fretum sororum Clapp. and kidney. Heart Type. 27. Trochomorpha aukiensis, sp. nov. Plate 2, fig. 10-15. 32,535. Auki, Malaita Id. Shell solid, depressed, broadly umbilicate, the umbilicus contained in the entire diameter of the shell four times. Color, light corneous, with four chest-. 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. : The Museum
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