296 PROCEEDINGS OF THE ACADEMY OF [Nov.—Dec., 
——————— JS —- 
| / i) i é - = a . . . 
Mus. No.) Penis. Feu yee Hee l nee Vagina.| Station. | Fig. 
109,078 | 12.5 eo 8 ao he alk Wee ee 10 26 | 69. 
109,077 | 12 8 10 1 8 14 26 ~—s| ‘6a. 
119,039 9 6 C23 1 12 8.5 | 4(1911). | 62. 
119,040 | 10 8.5 % WSO A aab is ee 9:5) (SOL) i eS 
109,074 | 11.5 10 9 MS ate r= We 3 haem eles 
109,083 8.5 7 Mees L) Re) oo |lereneraas 7 22 =| -6e. 
109,084 9 Yee NES 0 ll Oho oreeeaee 6/.. 
109,080 | 12.5 GAM het Seah Oy heart hetee i 30: ) ives ae 
109,071 | 11:5 6 iis: Oe S len omen 6 Cave | 6),c 
This species is closely related to. 8. hachitana (Dall) and S. compar 
Pils. It has the peristome more thickened within than the former 
and differs from S. compar? by the more solid shell, more thickened 
peristome, etc. 
The more widely open umbilicus distinguishes it readily from other 
Sonorellas of the hachitana group found in the Santa Catalinas. 
Other specimens of the original lot from the type locality measure: 
Alt. 15 diam. 26.3 mm. Alt. 13.8, diam. 24 mm. 
ce 15.3 “ce 94.6 ce (a9 ce ce 93 (a3 
ce 13 (a9 93.6 ce ce 12.5, ce D1, ce 
The largest examples were taken at Station 3, two measuring: 
Alt. 16.4, diam. 28.2 mm.; 5 whorls. 
ce lt7/ ce a8 ce 5 ce 
Marble Peak and Apache Camp have oak, juniper and sycamore 
wood on the lower slopes; the crest of the ridge, the head of the 
main “slide,’’ is in the pine belt. 
Sonorella marmorarius limifontis n. subsp. PI. III, figs. 5, 5a, 5b. 
The shell is depressed, openly umbilicate (the width of umbilicus 
contained 7 times in that of the shell); whitish, faintly buff near the 
suture and on the spire, having the usual chestnut-brown band. 
Last whorl wide, very deeply descending in front. Surface glossy, 
weakly marked with growth-lines as in related species of the hachi- 
tana group, and showing weak traces of impressed spiral lines on the 
upper surface of the last whorl. The last whorl descends deeply 
and abruptly in front. The aperture is very oblique, rounded-oval. 
Peristome somewhat expanded, slightly thickened within. 
3 Sonorella compar, new name for Sonorella ashmuni Pils., Proce. A. N. 8. 
Phila. 1905, p. 259, pl. 17, figs. 9-14. Not S. ashmuni Bartsch. 
On comparison with the type cf S. ashmuni, this species is seen to differ con- 
spicuously by the more depressed and more openly umbilicate shell —H.A.P. 
