94 PROCEEDINGS OF THE ACADEMY OF [VOL. LXXIV 



1900. Sonorella indioensis Pilsbry, Proc. Ac. Nat. »Sci. Phila., 1900, p. 550 



(passing mention). 

 1904. Sonorella indioensis Bartsch, Smiths, Misc. Coll., vol. 47, p. 187, 



189, pi. 33, fig. 1. 

 1908. Micrarionta indioensis Pilsbry & Ferriss, Nautilus, vol. 21, p. 135 



(brief note). 



This is the longest known of the desert Helices, yet does not 

 seem to have been collected many times, and I cannot find thai 

 living specimens have ever been taken. In spite of much exertion, 

 we ourselves were no more fortunate than our predecessors in this 

 respect. The type locality is said to be "near Indio, " but without 

 doubt this can be emended to "south of Indio," rather than north, 

 as the dead shells found by us in the cove back of Indian Well are, 

 except for their slightly smaller size, so nearly typical as to indicate 

 I hat the original specimens could not have been collected so very 

 far away. At this point the steep slope is, at the present time, 

 very dry, supporting only the scantiest vegetation, and even dead 

 shells proved difficult to find, although occurring scattered loosely 

 on the surface from, near the base of the slope to the top of the 

 ridge. Only 11 fairly good shells was the total catch of the party 

 in an hour or so of work. This and M. xerophila appear to be 

 species of the Santa Rosa Range; they are unknown from the 

 Sau Jacintos. 



The largest specimen at hand measures: maximum diameter. 

 18.6; minimum diameter, 15.1 ; altitude, 10.5; diameter of umbilicus, 

 2.0 mm. It has 4 % whorls. 



Micrarionta harperi (Bryant 1900) Plate X, figs. 5-S. 



1900. Epiphramophora harperi Bryant, Nautilus, vol. 13, p. 143. 



1900. Epiphragmophora Harperi Bryant, W. Am. Sci., voi. 11, p. 30 (re- 

 print of preceding). 



1900. Epiphragmophora Harperi Orcutt, W. Am. Sci., vol. 11, no. 91, p. 

 70; no. 92, p. 28 (brief note). 



Shell strongly depressed, of moderate weight; whorls convex; 

 sutures distinct; last whorl strong y descending behind peristome. 

 Umbilicus wide and deep, contained about six times in the diameter 

 of (he shell, funicular, permeable, all the whorls easily visible to 

 the apex. Aperture strongly oblique, its deflexion about 45-50°. 

 Peristome but little thickened hardly reflexed except slightly at 

 the umbilicus, which it barely indents. Nuclear whorls heavily 

 covered with narrow, elongate papillae, ranked in oblique, forward 

 slanting lines so close together as to be almost or quite confluent. 

 the lines thus be ng transformed practically into low lirae; papillae 

 on subsequent whorls less crowded and always smaller and rounder 

 than the foregoing , being very obscure on the upper surface of the 



