THE NAUTILUS. 43 
opening was usually oblong and about one or two millimeters 
long. Here the trail was so thorny and the gulches so deep we 
could walk only about a mile per hour in the mountain. Two 
days were given to the slide. 
We had good success in the Tumacicori, Cayetano, Patagonia 
and other mountains on all sides of the peaks and had forgotten 
that in some ranges shells lived only on the north side. On the 
fourth trip to the Whetstone, while passing the north side of a 
small peak to get to the largest in the range, another Sonorella 
was found alive and plentiful. Also Oreohelix hwachucana and 
a Holospira. 
We feel certain there are a considerable number of undis- 
covered snails in the limestone, well watered and timbered (8,000 
feet) peaks of the Whetstones, on the north side. Some of these 
we examined, on the south side. 
The rains arrive in Arizona in July, which is the best grow- 
ing month; but this year in the first week of May the Mariposa 
group of lilies covered the slopes. The west mesa of the Santa 
Ritas was a golden yellow, for the poppies were in bloom. Also 
the large white thistle poppy. The Ocotillo (Crown of Thorns) 
with a deep crimson spike, and cactus bloom, white, crimson 
and orange, warmed up the desert hills. The last night out 
blankets were spread in the dry bed of a stream in a pass of the 
Mustangs. It was really a beautiful place. Gravel makes a 
good bed, as desert beds run, and the banks were decorated with 
spreading walnuts and oaks. The junipers and cottonwoods 
were artistically rounded and all in full leafage. Three kinds 
of doves were talking, a cardinal, a thrasher and the vermillion 
fly-catcher were singing just at sundown, and the black and 
white scolding hummingbird in our tree, nervous in the face of 
distinguished company, had settled down in his thimble nest 
for the night. 
The Mustangs are not large mountain, but they have pleasing 
profiles, domes and table tops, for background purposes, when 
the moon is up a little way and the evening star is in close con- 
junction. Arizona nights are a cut-glass, crystal affair. Not 
smoky and beclouded. 
When the after-glow was just about right I led the partner 
