Bulletin of the Museum of Comparative Zoology at Harvard College . once distinguished by the shortersimple apertural lamella not ending at or very near the upper termination of thepalatal margin, as it does in hordeacella, and by the smooth surface. The fine bluishhue may also be a distinguishing character if it prove constant. The above is Sterkis original description. Pupa calamitosa. Plate II. Fig. 1. See 3d Suppl., p. 219. A reduced copy of one of the original figures is givenhere. Pupa Hemphilli, Sterki. In examining a lot of about forty-five specimens of Pupa calamitosa from thebanks of
Bulletin of the Museum of Comparative Zoology at Harvard College . once distinguished by the shortersimple apertural lamella not ending at or very near the upper termination of thepalatal margin, as it does in hordeacella, and by the smooth surface. The fine bluishhue may also be a distinguishing character if it prove constant. The above is Sterkis original description. Pupa calamitosa. Plate II. Fig. 1. See 3d Suppl., p. 219. A reduced copy of one of the original figures is givenhere. Pupa Hemphilli, Sterki. In examining a lot of about forty-five specimens of Pupa calamitosa from thebanks of San Tomas River, Lower California, I found there were two distinctforms in them. The author says, in his description of P. calamitosa: Severalspecimens have only one lamella on the outer lip, and are rather larger than thetypical form described, represented in Plate XII. Fig. 16 (loc. cit., No. 7). ProbablyI had a greater number of examples at disposition than Mr. Pilsbry. The twoforms proved to be distinct by an entirely different formation of the lamellae, as. MUSEUM OF COMPARATIVE ZOOLOGY. 193 well as of the basal part of the shell. And among the whole number I found notone intermediate or doubtful specimen. There is no doubt but that we have toconsider them as being specifically distinct, the more so since they live together inthe same locality. For tlie new species I would propose the name P. HemphilU, inhonor 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 bethe best way to characterize the one in question by comparing it with P. calamitusu,Pilsb. P. HemphilU averages a trifle larger than its companion, but either is some-what variable in size. While calumitosa has aminute perforation, HemphilU is umbilicated inquite 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-itosa the
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