. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. MUSEUM OF COMPARATIVE ZOOLOGY. 193 well as of the basal part of the siiell. And among the whole number I found not one intermediate or doubtful specimen. There is no doubt but that we have to consider them as being specifically distinct, the more so since tiiey live together in the same locality. For the new species I would propose the name /-*. JJeinpltilli, in honor of the man to whom we owe so many valuable additions to our malaco- logical fauna. As in shape and general appearance the two species are almos
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. MUSEUM OF COMPARATIVE ZOOLOGY. 193 well as of the basal part of the siiell. And among the whole number I found not one intermediate or doubtful specimen. There is no doubt but that we have to consider them as being specifically distinct, the more so since tiiey live together in the same locality. For the new species I would propose the name /-*. JJeinpltilli, in honor of the man to whom we owe so many valuable additions to our malaco- logical fauna. As in shape and general appearance the two species are almost alike, it may be the best way to characterize the one in question by comparing it with P. calamilosa, Pilsb. P. HemphUli averages a trifle larger than its companion, but either is some- what variable in size. While calamitosa has a minute perforation, HemphUli is umbilicated in quite a peculiar way. There is a nodule-like pro- jection on the umbilical part of the last whorl, producing a rima beside the umbilicus ; in calam- Uosa there is nothing of this formation. On the other hand, the latter has a small but distinct groove-like impression just at the base, near the aperture appearing as a slight projection inside. This feature is wanting in HemphUli. Lamellae: in the latter species, when looking from front, only one is generally seen in the palatal wall, corresponding to the superior one in calamitosa, but longer; i. e. be- ginning deeper in the throat, and fairly seen on the outside; also marked there by a corresponding impression, ascending in a curve from near the base. A little dis- tant from its inner end, just above the projection mentioned, there is another lamella beginning, directed toward the base and ending there, also seen on the outside. Quite generally there is a very small, thin, but well formed lamella in the palatal wall, near the projecting auricle. The columellar fold is quite short and small in HemphUli, yet consisting of a vertical and a horizontal part
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