1905.] NATURAL SCIENCES OF PHILADELPHIA. 217 



This species resembles H. ferrissi and H. cionella in shape, but differs 

 by its larger size and the obsolete sculpture of the median whorls, as 

 well as by the slightly different internal lamellae. It is known by the 

 original specimens only. 



Holospira cionella u. sp. PI. XXVII, figs. 30-33. 



The shell is very shortly rimate but imperforate, cylindric with a 

 short terminal cone, corneous-white. Whorls 11| to 12^, convex, the 

 first 2^ smooth, second whorl narrow, the first wider and bulging. 

 Subsequent whorls are sharply and closely ribbed throughout. The 

 last whorl is compressed laterally, tapering downward, the base white, 

 rounded and prominent; it is contracted, descends a little, and is 

 shortly free in front. The aperture is very shortly ovate, the peristome 

 thin and narrowly expanded. The axis is moderately large and cylin- 

 dric, with a low, blunt lamella at the end of the penultimate and begin- 

 ning of the last whorl. 



Length 10 to 12, diam. 3 mm. 



Fort Bowie, Cochise county, Arizona. 



The uniform ribbing throughout, the cylindric shape and short ter- 

 minal cone are the prominent features of this species, which groups 

 with H. mearnsi, cockerelli and chiricahuana. 



Holospira crossei Dall. PI. XXVI, fig. 8. 



This species is closely related to H. cockerelli, but differs by its wider 

 shorter form and much shorter terminal cone of the spire. At the end 

 of the penultimate whorl there is a very weak prominence upon the 

 axis near the basal wall, hardly to be called a lamella. The tapering 

 portion of the spire is ribbed, the cylindric portion smoothish. 



Length 11, diam. 3.7 mm. 



New Mexico; top of Hacheta Grande Mountain, Grant county, with 

 H. mearnsi and H. bilamellata. 



Figured from one of the original lot for comparison with the related 

 species. It has not again been found. 



Holospira mearnsi Dall. 



The spire tapers gradually and is ribbed, the ribs somewhat weaker 

 on the intermediate whorls, stronger again at the base. Whorls 14. 

 The axis is small, with a short, strong lamella near the base in the pe- 

 nultimate whorl, as in H. cockerelli and H. regis. Length 14.5 mm, 



Southw^estern New Mexico, on the top of Hacheta Grande Mountain, 

 Grant county, with H. crossei, a smaller species with less projecting 

 aperture. 



