An immature shell in the U. S. National Museum from "Doubtful Canyon", Peloncillo Mountains, seems to be the same.
The band at the shoulder is only faintly visible in a few shells, and in some entirely absent, leaving an ill-defined whitish zone.
Fig. 146. a-e, Sonorella hachitana peloncillensis. A. genitalia; B. C, verge and end of same more enlarged; D, E, verges of two other individuals, F, G, S. h. flora, terminal ducts and verge.
Sonorella hachitana orientis Pilsbry Figs. 147, 148.
Sonorella hachitana. specimen from Filmore Canyon, Organ Mts., Pilsbry, 1905. Proc. Acad. Nat. Sci. Phila., p. 257, pl. 17, figs. 7, 8 (shell), pl. 23, fig. 19 (jaw).
Sonorella hachitana orientis Pilsbry, 1936, Nautilus 49: 110.
The aperture is noticeably larger than in S. hachitana, its width 55 to 58 per cent of the diameter of the shell; the umbilicus is usually smaller, and the last whorl descends somewhat less deeply in front.
- Height 13.4 mm., diameter 24.4 mm., width aperture 13.6 mm. Type.
- Height 11.7 mm., diameter 21.3 mm., width aperture 11.6 mm. Topotype.
- Height 13.3 mm., diameter 23.4 mm., aperture 12.8 mm. Ropes Spring.
- Height 14 mm., diameter 25 mm., aperture 13.7 mm. Ropes Spring.
- Height 13.8 mm., diameter 24 mm., aperture 13.6 mm. Filmore Canyon.
- Genitalia (Fig. 148), much as in S. hachitana; measurements are given on page 275. Jaw with 8 narrow, equal ribs.
New Mexico: Organ Mountains at Dripping Spring (Ferriss and Pilsbry), Type and paratypes 165931 A.N.S.P. Filmore Canyon (C.H.T. Townsend, 1897). Western foothills of the San Andreas Mountains in a ravine at Ropes Spring, about 30 miles northeast of Las Cruces (Ferriss and Pilsbry).
