Page:Land Mollusca of North America (north of Mexico) Vol. I Part 1 277-end.pdf/6

 protractive threads. The last whorl descends rather deeply in front. Umbilicus contained about 7-1/2 times in diameter. The peristome is expanded.

Height 12.3 mm., diameter 20 mm.; 4-1/2 whorls.

Fig. 152. Sonorella huachucana colis.

In the genitalia (Fig. 151: 9, paratype) this form resembles S. sabinoensis dispar. The penis is smaller, slender, becoming abruptly swollen near the base, the swollen part containing several large pilasters. The verge is very slender, with slight traces of annulation. Vas deferens is enlarged in the lower part, as in S. walkeri. Length of penis 4.8 mm., verge 3 mm., epiphallus 7 mm., flagellum 0.5 mm., vagina 10.5 mm.

The pallial region (Fig. 151: 3) shows a kidney more than half as long as the lung the proportion being 15 to 26 mm. The pericardium is 4.5 mm. long. The veins of the anterior portion of the lung are sparsely bordered with brown dots.

Arizona: Whetstone Range, Cochise County (Ferriss and Daniels), Type 130994 A.N.S.P., from a mile up from the Ranger Station.

The last whorl descends more deeply in front than in S. huachucana mustang, and the umbilicus is narrower; otherwise there seems to be little difference in the shells. The typical lot of S. huachucana cotis, from the place mentioned above, measures 20 to 22 mm., in diameter, and was differentiated from S. h. mustang mainly by the shape and size of the penis. In 1919 further collections were made in the Whetstones (Proc. Acad. Nat. Sci. Phila., 1923, p. 61; Nautilus, 33: 42), and larger shells, up to 25 mm. in diameter were found (Fig. 152: 6), equal in size to S. h. mustang, but more narrowly umbilicate. Though fresh, none were alive.

(Cotis, of a whetstone.)

Sonorella huachucana elizabethae Pilsbry & Ferriss Fitf. i53: i.

Sonorella elizabethac Pilsbrv & Ferriss, 1919, Nautilus, 33:20; 1923, Proc. Acad. Nat. Sci. Phila., 75: 65. pl. 1, fi,i. 1; pl. 4. figs. 1, la.

The shell is glossy, very dilute cinnamon-buff, fading to whitish on the base and in broad zones which border the very narrow (i to 4 mm.) chestnut-brown band. Embryonic whorls with S. hachitana sculpture; the following whorls microscopically lineolate-granulose when perfectly preserved; last whorl lightly striate, descending shortly in front. Peristome expanded, brown-edged.

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