. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. clapp: some mollusca fkom the solomon islands. 353 teeth from the twelfth on to appear bifid. At about the twelfth tooth small denticles appear on the outer edge. The outermost ten or twelve uncini are small and very spinous. In size and shape the radula of H. planospirus is not very similar to the radulae of some other species of Helicarion which have been figured, (Tyron, Man. conch., 1885, ser. 2, 1, p. 137, pi. 29, fig. 12. Hedley, Proc. Linn. soc. N. S. W., 1891, ser. 2, 6, p. 24, pi. 2, fig. 11; p. 687, pi. 41,
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. clapp: some mollusca fkom the solomon islands. 353 teeth from the twelfth on to appear bifid. At about the twelfth tooth small denticles appear on the outer edge. The outermost ten or twelve uncini are small and very spinous. In size and shape the radula of H. planospirus is not very similar to the radulae of some other species of Helicarion which have been figured, (Tyron, Man. conch., 1885, ser. 2, 1, p. 137, pi. 29, fig. 12. Hedley, Proc. Linn. soc. N. S. W., 1891, ser. 2, 6, p. 24, pi. 2, fig. 11; p. 687, pi. 41, fig. 30), differing by being almost two thirds as broad as it is long and also in the large number of teeth in a row. The shape of the individual teeth are, however, typically Helicarion. 4. Helicarion malaitaensis, sp. nov. Type. Plate 1, fig. 1-5. M. C. Z. 36,225. Auki, Malaita Id. Shell depressed, thin, shining, with faint obUque arcuate growth-striae above, hardly discernible below, and very faint spiral impressed Lines on the upper half of the body-whorl, corneous, lighter on base, whorls 2^, spire nearly flat, suture impressed, columellar lip slightly membraneous, body-whorl flattened above, convex below. G. d. 17 mm. 1. d. 12 mm. alt. Fig. 2.— Helicarion malaitaensis Clapp. Radula. The shell differs from that of H. planospirus in being larger, more solid and much darker in color, and from H. aurea Pfeiffer (Reeve, Conch. Icon., 1862, 13, pi. 9, sp. 69) in size and shape. The animal in alcohol is gray, 32 mm. in length. The right shell- lobe extends completely over the apex of the shell, the left covering the anterior quarter of the body-whorl. The foot, divided longi-. 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 M
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