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, Bkug. 



Plate II. Fig, 4, 



I give a new figure of the variety of this species. 



Holospira Arizonensis, Steakns. 



Shell dextral, elongately cylindrical, pupiform, dingy white to pale horn-color, 

 translucent. Number of whorls, twelve to thirteen. Slightly convex, tlie 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 

 umbilical notch. The apex and following whorl 



are smooth ; the three or four succeeding whorls /mv^^^w TMW 

 sharply and somewhat obhquely plicated longitu- 

 tudinally, the median and following whorls be- 

 coming somewhat obscurely sculptured other than t^v^MHiR ffiLVW 

 by distinct growth lines. The basal whorl is jgry^ 

 strongly sculptured below, and back of the mouth, 

 and obtusely angulated underneath. Aperture 

 ovate, slightly angulated anteriorly, somewhat 



effuse, rimmed and projecting. The dimensions of two ex.^mples are as 

 follows : — 



mm. 



Longitude 12J 



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- 

 tured throughout, and in minor features also different ; H. Pfeifferi, Menke, col- 

 lected by Remond at Hermosillo, in the same province, with the previously named 



