. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 370 bulletin: museum of comparative zoology. 46. Trochomorpha merziana (Pfeiffer). Helix merziana Pfeiffer, Proc. Zool. soc. London, 1852, p. 135. Tryon, Man. conch., 1887, ser. 2, 3, p. 89, pi. 18, fig. 55. Helix {Videna) ynerziana Smith, Proc. Zool. soc. London, 1885, p. 593. Wai-ai, San Christoval, Bio, Ugi Islands. Specimens (M. C. Z. 32,510) from Wai-ai appear to be most nearly typical, but differ in having the yellow strigations more numerous. The average size of specimens in this lot is, g. d. mm., 1. d. 2
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 370 bulletin: museum of comparative zoology. 46. Trochomorpha merziana (Pfeiffer). Helix merziana Pfeiffer, Proc. Zool. soc. London, 1852, p. 135. Tryon, Man. conch., 1887, ser. 2, 3, p. 89, pi. 18, fig. 55. Helix {Videna) ynerziana Smith, Proc. Zool. soc. London, 1885, p. 593. Wai-ai, San Christoval, Bio, Ugi Islands. Specimens (M. C. Z. 32,510) from Wai-ai appear to be most nearly typical, but differ in having the yellow strigations more numerous. The average size of specimens in this lot is, g. d. mm., 1. d. 20. mm., alt. mm. Specimens from Bio (M. C. Z. 32,512) difPer from those from Wai-ai in being smaller, lacking nearly all of the yellow streaks on the upper surface, in being more depressed, with deeper sutures, and not having the thread-like yellow lines separating the whorls. The ultimate whorl is nearl}^ as rounded below as above, the carina. Fig. — Trochomorpha merziana (Pfeiffer). Reproductive organs. dividing it into equal halves. The average size of specimens from Bio Is., G. d. mm., 1. d. mm., alt. mm. Specimens from Ugi (M. C. Z. 32,514) differ from those from W^ai-ai in much the same manner as do those from Bio. They are generally darker, with the base more rounded and the carina therefore dividing the ultimate whorl into two subequal halves. The base is frequently chestnut with no trace of banding. The width of the aperture from the columellar wall to the periphery is much less then in the specimens from W^ai-ai. None of the difFerences are, however, constant, connecting links occur- ring in each lot. There is no reason from the material at hand, to be-. 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
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