THE NAUTILUS. 13 
the La Sal range, so convenient to Montecello, a stage running 
to the La Sal P. O. at the foot of the range. Then, too, there 
was the Carrizo range a short distance from where we crossed 
the San Juan at Ship Rock, but duty called us away from this 
new and prosperous agricultural section. (This is thrown in 
because the Dean had just harvested over 3,000 bushels of wheat 
from less than seventy acres of sage-brush land.) 
September 13th the party again divided, Ferriss to Joliet and 
the Dean for Tucson, taking with him a couple of young 
Wetherills to the University, adding with his machine that 
much to our desert journey. The girls did their part like men, 
there was no sickness, no accidents, no great adventures and it 
was the most enjoyable picnic ever in the most country per acre 
ever. 
Concerning the little ones: Pupilla syngenes Pils. and syngenes 
dextroversa P. & F. seek the well-drained hillsides where grass 
roots and spawls of stone lying upon the soil furnish shelter. 
So far they have not been gathered in deep forest conditions 
where pupas mostly congregate. The first of these was found 
alive in the grassy hummocks under the dry cliffs of the Black 
Mesa at Marsh Pass and again at Kayenta. 
The other was associated with Oreohelizx y. clutei in the rose 
bushes and grass at Red Rock Spring on the south slope of 
Navajo Mountain. 
Gastrocopta pellucida hordeacella (Pils.), Pupoides hordaceus 
(Gabb) and Gastrocopta cristata (Pils. and Van.), of the plains, 
are seldom found alive. When dead shells appear in the ant- 
hills a little patience and some time may obtain a few live ones 
in the grass, chips of wood or surface stone in that vicinity. 
The great harvest of these (dead) has been found in the drift of 
streams draining the plains. 
Thysanophora horni at Brownsville, Texas, is at home in leaf 
mold of the mesquit thickets, and has colors and bristles. In 
Arizona it is found under conditions so dry no other snail ex- 
cept Succinea avara will keep it company, but it thrives and is 
found in large numbers with the Chenazis pupas in rock piles 
shaded by cliffs. 
The Thysanophora ingersolli group keep company with the 
