﻿BARTSCH] NOTES ON llll GEN1 S SONORELLA I89 



from the next two species, which arc rather openly umbilicated. The 

 type locality is Palm Springs, Riverside county, California; other 

 localities are Palm valley and vicinity, Colorado desert. San Diego 

 county, California. 



SONORELLA INDIOENSIS (Yates) 

 ( Plate XXX] 1 1, figure i) 



Helix (Arionta) carpenteri Newc. var. indioensis Yates, Nautilus, vol. 



iv, p. 63. 1890. 

 Arionta var. indioensis Dall, Proc. U. S. Nat. Museum, vol. xix, p. 337, 



1896. 

 Epiphragmophora indioensis Pii.sp.rv, Man. Conch., vol. ix. p. [99, [894. 

 Epiphragmophora indioensis Pilsbry and Johnson, Nautilus, vol. xi, p. 



59, 1897- 



Sonorella indioensis Pilsbry, Proc. Acad. Nat. Sci. Phil'a for 1900, p. 



506, 1 90 1. 



The type is said to measure : maj. lat. 18 mm., alt. 12 mm. ; it conies 



from Indio, Riverside county, California. S. indioensis is larger 



but more depressed than the next species. A specimen, here figured, 



in the U. S. National Museum collection (No. 108,530), from the type 



locality, measures: maj. lat. 17.8 mm., min. lat. 14.3 mm., alt. 10.5 



mm.; aperture: maj. lat. 9.0, mm., alt. 8.5 mm.; umbilicus about 



1.8 mm. 



SONORELLA COLORADOENSIS (Stearns) 



(Plate XXXII, figure 3) 

 Helix (Arionta) coloradoensis Stearns, Proc. U. S. Nat. Museum, vol. 



xiii, p. 226, pi. xv, figs. 6, 8, 12, [not 7], 1S90. 

 Helix coloradoensis Pilsbry, Man. Conch., vol. vm, p. 225, pi. 56, figs. 1, 



2, 3. 1893- 

 Epiphragmophora coloradoensis Pilsbry, Man. Conch., vol. ix, p. 199, 



1894. 



Epiphragmophora (Arionta) coloradoensis Dall, Proc. U. S. Nat. Mu- 

 seum, vol. xix, pp. 340-341, 1896. 

 Epiphragmophora coloradoensis Pilsbry and Johnson, Nautilus, vol. xi, 



p. 59, 1897- 

 Sonorella coloradoensis Pilsbry, Proc. Acad. Nat. Sci. Phil'a for 1900, 



p. 560, 1901. 

 Sonorella coloradoensis Stearns is the smallest member of this 

 group. The type (No. 104,100 U. S. Nat. Museum) measures: 

 maj. lat. 16.4 mm., min. lat. 13.8 mm., alt. 10 mm.; aperture: maj. 

 lat. 8.5 mm, alt. 8.2 mm., umbilicus about 1.8 mm. The shell of this 

 species is more elevated than in S. indioensis Yates, and the aperture 

 is more circular in outline. The type locality is Grand Canon of the 

 Colorado, opposite the Kaibab plateau, altitude 3,500 ft. Pilsbry and 

 Johnson (loc. cit.) also cite this species from Inyo and San Diego 



