288 PROCEEDINGS OF THE ACADEMY OF [Nov—Dee. 
del Oro and some other places the general hue is cinnamon or cin- 
namon-buff, opaque, and the size small, diam. 18 to 20 mm. The 
smallest adult seen measures 17 mm. in diameter. 
Specimens from the Rincons, Station 22 (1917), are pale cinnamon 
or greenish above, fading to a pale, bluish-gray on the base; the 
band with narrow, indistinct paler borders or without them. The 
lip is conspicuously brown-edged. The umbilicus is generally 
wider than in the Catalina shells. One perfect shell and another 
broken one in this lot are albinos, or at least the tint is very pale, 
and there is no band. These shells are found deep in a rock slide in 
a quaking asp thicket. At Station 20 (1917), on the northern slope 
of the Rincons, two dead but fresh shells were found in a day’s search. 
Sonorella odorata marmoris n. subsp. PI. III., figs. 6 to 6b. 
The shell is more solid than S. odorata, opaque; cinnamon, paler 
around the umbilicus and on both sides of the chestnut-brown band. 
Last whorl is decidedly more depressed than in S. odorata, and is 
narrower as viewed from above. The umbilicus is wider. The 
aperture is much smaller. 
Alt. 10.4, diam. 20 mm.; 42 whorls (type). 
‘“c 9, 73 13 6 41 ‘c i 
Bee, 
“s 
Fig. 2. Genitalia of S. 0. marmoris, No. 109,079, with detail of penis-papilla. 
Santa Catalina Mountains: Marble Peak, on the east side above 
the rock slide; old Dan’s Gulch on the northwest side, type loc.; 
ridge running toward Mt. Lemon; Ferriss 1911 and 1913. Type No. 
109,075 A. N.S. P.; paratypes 109,075a, also in Ferriss collection. 
Genitalia (fig. 2) in general similar to S. odorata but the penis and 
papilla are decidedly longer and there is a flagellum, well developed 
for a Sonorella. Measurements of the organs are given in the table 
on page 287. 
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