68 PROCEEDINGS OF THE ACADEMY OF [Vol. LX XV 
Sonorella walkeri aguacalientensis P. & F. 
Allen Mountains, Station 206 (1919), a small group of hills in 
Josephine canyon, in the southwestern foothills of the Santa Ritas, 
towards the Cayetano Mountains. 
Fine, large specimens, about 25.5 mm. in 
diameter, were taken. The reproductive or- 
gans measure in length: 
PERISH O is ake ara baer scar See ste re EE 
Penis-papille ccd cent. tee ee | Ps et 
ies 3 Gaines ete tee ee 5.Oas 
emia POCraACtOrsin-..-s-9 6 eee nee oe long. 
Etec lia ee cede koe cae Meee = oe vestigial 
MV eeimeietes, oc a thoy ats 4 Aorta ees bee 12 mm. 
MSeCUEIIING i727 titi o eas dh on ee cae 43729. 
Sonorella walkeri montana Pils. & Ferr. Plate. I, fig. 11, 
Sonorella montana P. & F., Nautilus vol. 33, July, 
1919, p. 19. 
The shell in this handsome form is not dis- 
tinguishable from that of S. walkeri: but mon- 
tana differs somewhat by the still smaller male 
organs. The penis is extremely small, having 
a short, stout basal sheath and long retractor 
muscle. The flagellum is reduced to a mere 
bud; beyond it the vas deferens is enlarged. 
The base of the vagina is enlarged. Speci- 
mens from Stations 232 and 238 agree. Meas- 
urements of the organs follow: 
B ig. b= ici Pers Oe ek Chet eek a Nee 2.5 mm. 
NS TE a Os EP ENS Pye ey ers ae0ry ies Lee <4 ac to res | oe 
43724. p. penis, pr. Hy olin BQ 
penial retractor, sp.d. Lp p a Hiabcse het slaitetal elena a teoemen ater oceans its : 
duct of spermathees. “ VagiM@. "22 eae - os ee athe = oe 
Museum) Noi. 5 0 .i4% 43724. SURGION "certo. seen 232. 
The preserved animal is nearly white. 
Pajaritos range at Station 232, Montana Peak, near the mine; 
238, Bear canyon in Bear Valley; and 231, half mile northeast of 
Cassin’s gate in the pass, highway to Oro Blanco. 
Sonorella linearis n. sp. Plate I, fig. 12. 
Northern end of the Santa Rita Range, the type from Station 50 
(1917), on the western side of the saddle, overlooking Helvetia. 
Also Rosemont, Stations 48 and 49, abundant at the latter. At 
Stations 49 and 50 it was associated with S. hesterna. 
The shell is umbilicate (the umbilicus contained about seven 
times in the diameter), dilute cinnamon, the base whitish, with a 
