14 THE NAUTILUS. 
Pupillidae, Zonitoides, Gonyodiscus, Vallonia, Vitrina alaskana, 
Euconulus, and Cochlicopa lubrica, in deep rock slides and damp 
forest rubbish. 
Some of the others than those mentioned in this paper are 
here located from the notes: Pupilla hebes (Anc.), fossil beds of 
Laguna canyon; leaf mold Navajos and Blue Mountains and 
the Black Mesa at the Rainbow Bridge, in moss and horsetails 
( Equisetum). 
Pupilla hebes mut. albescens, now published for the first time, 
in the aspens at the Betatakin ruins, abundant and variable, 
sometimes toothed, albino. 
Pupilla blandi Morse, drift of Chinlee and wash near Adamana. 
Gastrocopta ashmuni (St.), drift of a wash from the north, 
near Adamana, Arizona, and in the drift of a branch of the 
Chinlee near the Utah boundary. 
Gastrocopta procera meclungi (Hanna and Johnson), drift near 
Adamana. 
Vertigo ovata Say, drift near Adamana and Navajo Creek near 
the Tso ranch, and fossil beds of Laguna Canyon. 
Vertigo coloradoensis arizoniensis, Pils. & Van., fossil beds of 
Laguna Canyon, drift of Chinlee near Utah boundary. 
Vertigo modesta insculpta Pils., War God and Two Springs, 
Navajo Mountain, Blue Mountain, Snow Spring near Monte- 
cello, Utah, drift of Navajo Creek near Tso ranch. 
Vallonia gracilicostata Reinh., Blue Mountain and the fossil 
beds of Laguna Canyon. 
Others collected that seem to be common to the region wher- 
ever conditions are favorable were the following: Vallonia per- 
spectiva St. and cyclophorella Ckll., Gonyodiscus cronkheiter anthonyt 
(Pils. ), Zonitoides alachuana (Dall), arboreus (Say), Polita in- 
dentata umbilicata (Ckll.), Euconulus fulvus (Mill), Vitrina 
alaskana Dall, Cochlicopa lubrica (Miuill.), Pupoides marginata 
(Say), Gastrocopta pilsbryiana (St.), Succinea avara ( Say). 
