37 
it Sagat -dighens 
Coo , Cat-as-pr a a 5 3 
faving: Leavin (Oreuit). Modes Sa 
tos creek, foe California at Belding). 
PHYSA A LLACEA. Gould, 
Shel! ovate-ventricose, ait ning, horn 
colored; a re ever acute; whorls 6, 
ated; suture decidedly im- 
pressed; cuMertinke Broadly five- 
sixths the length of the Shit ip thin, 
submargined with red; colum ella quite 
flexuous, Sd with callus. Length 25, 
diameter 18 m 
pene: tan ‘Oyosa, Washington; Or- 
PHYS DIAPHANA Tryon 
er, Cal‘ac pr 2d ser, 3: 103. Zoe 1:196. 
; GUENDA Tryon. 
Shell variable in sometimes 
lindr‘ca! metim 
impressed; 
with growth lines; 
aos eeysiget wider ‘below, 
white without 
thine ‘a eds to ithe npteoh tah below. Len 
1 
ertu 
Solimetts long, 
ee 
‘ving: Marysv: lle, Stockton, San D‘- 
ege California. Tijuana, Baja Califor- 
nia hyo 
PHYSA GA 
I Try 
_ Shell thin, Y iGnols neriated by the lines 
ody whorl inflated, its up- 
hors 6, convex, with dis- 
Color ee corneous, very 
wit es ‘ned with 
nex acute, 
tinct sutur es. 
lake; Becta Ana 
ate ae rnia. 
sol a, smooth and 
whor's s 5, gf aot iSgia 
: engt 
- bpanéeed: 
one haraiy”) per’ orate, 
me Col brane river; Eyre lake, 
Quaternary: Near Sersok. Nevada 
‘Very abundant on the Colorado Desert 
Sine os silicified’’ eae te 
- Virtually only a distorted form 1 ee lk 
: terostropha: | “evlaentiy the same form 
ocenrs livins e Dos Palmas springs, 
Colorado D 
PHYSA. LORDI Baird 
a. Washington. Mumhoidt lake Ne- 
. TRASKII I Lea. 
very much _ infil ated, 
s‘riate, sem’-trans' nspal 
che stnut pulor: spire 
aoaieapivat 
repairs 
The West American Scientist. 
Osovoos, British Colum- 
ront. abidsf ‘e. (George H. 
ifornia CW, 
produced, pointed at the apex; sutures 
impressed; tacenyded oe ey last one Pes 
large and nflated; aperture 
pacer ae “expanded: ics lip conte: and 
Eg? e margin brown-banded; colum- 
ageehaed in the mid nd . 
hished’ Se are fold. Length 9, di- 
18 Los Angeles river, ‘Cali- 
PH rie VIRGATA a. uld. otic Re 
Shell moderate, soli smoo longate- 
ha gi pera -colo red with lonsitaa oli- 
vac 
Saaipe gg ph ant yellowi sh- red. 
diameter 
Living: ’ Gila river, Arizona to 7 
Webb). Los ‘Ananion and San Diego, C 
ifornia 
PISIDIU yi OES en 
Sie gene Hey California. : 
ara 2d se 217. Zoe 1:197. 
‘show obtus ety “cart 
whe right AO ioaehea: 
rounded ‘whorls; aperture ovate! 
lav, som s cate expanded 4 
arta: axis, five-eighths to one; 
% to &% in 
eee etamath lake, Oren 
Lassen county, Calif. Nevada, C 
veda river. : 
Quaternary: Cienega Grants & 
Desert.—T. H. Webb: W. P. 
margin forming a Ss) : 
beyond the edge te shell, eh 
ne 
