. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. MUSEUM OF COMPARATIVE ZOOLOGY. 201 Liguus fasciatus, Mull. Plate I. Fig. 5, The Vaccas Key variety, noticed in page 435 of the Manual of American Land Shells, is figured in the plate. Orthalicus undatus, Beug. Plate II. Fig. 4. I give a new figure of the variety of this species. Holospira Arizonensis, Steabns. Shell dextral, elongately cylindrical, pupiform, dingy white to pale horn-color, translucent. Number of wiiorls, twelve to thirteen. Shghtly convex, the su- tures distinctly defined. The upper six or se
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. MUSEUM OF COMPARATIVE ZOOLOGY. 201 Liguus fasciatus, Mull. Plate I. Fig. 5, The Vaccas Key variety, noticed in page 435 of the Manual of American Land Shells, is figured in the plate. Orthalicus undatus, Beug. Plate II. Fig. 4. I give a new figure of the variety of this species. Holospira Arizonensis, Steabns. Shell dextral, elongately cylindrical, pupiform, dingy white to pale horn-color, translucent. Number of wiiorls, twelve to thirteen. Shghtly convex, the su- tures distinctly defined. The upper six or seven whorls rather abruptly tapering towards the obtuse apex, which has a slightly twisted and rather a papillose aspect. The last whorl is curved under and constricted back of the mouth, forming an (^^^BSii (MS^ umbilical notch. The apex and fohowing whorl ^^ are smooth; the three or four succeeding whorls /^\V^™™ ^TiTTi" sharply and somewhat obliquely plicated longitu- tudinally, the median and following whorls be- Wii'9'iS L^i^'' coming somewhat obscurely sculptured other than Lv^as^df "5^^ by distinct growth lines. The basal whorl is E'^^^lf strongly sculptured below, and back of the mouth, Wc<'?JiVi»lD' "^ and obtusely angulated underneath. Aperture ovate, slightly angulated anteriorly, somewhat eflFuse, rimmed and projecting. The dimensions of two examples are as follows: — mm. Longitude 12^ Longitude 13 Greatest diameter 4 Greatest diameter 4 Dos Cabezas, Arizona, where the above two specimens and numerous fragments were found in a cave in November, 1889, by V. Bailey, and contributed to the United States National Museum (No. 104,392) by Dr. C. Hart Merriam. Among the species of this group that are geographically related is 77. Remondi, Gabb, described from Arivechi, Province of Sonora, Mexico, a form sharply sculp- tm"ed throughout, and in minor features also different; H. Pfeifferi, Menke, col- lected by Remond at Hermosillo, in the same pr
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