. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. clapp: some mollusca from the solomon islands. 361 periphery and on the base; color antique-brown, fading to nearly white in the umbilical region, suture slightly impressed. WTiorls 4^, last whorl rounded at the periphery, not descending. Aperture slightly oblique. Peristome simple Columella arcuately descending, thickened. G. d. mm. 1. d. mm. alt. mm. 8 p¥rAi. 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. T
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. clapp: some mollusca from the solomon islands. 361 periphery and on the base; color antique-brown, fading to nearly white in the umbilical region, suture slightly impressed. WTiorls 4^, last whorl rounded at the periphery, not descending. Aperture slightly oblique. Peristome simple Columella arcuately descending, thickened. G. d. mm. 1. d. mm. alt. mm. 8 p¥rAi. 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).. 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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Keywords: ., bookauthorha, bookcentury1900, bookdecade1920, booksubjectzoology
