THE NAUTILUS. 5 



in the yellow pine about a mile in width along the southern 

 and eastern slopes. The talus covered with quaking asp largely 

 composed of heavy sandstone blocks is an ideal situation and 

 Oreohelix was at home. The summit of about two hundred 

 acres fairly level is heavily clothed in spruce, and over the top, 

 under the precipices are occasional springs that feed the streams 

 crossing the Rainbow trail below. Many fairy bowers, coves 

 and valleys are hidden here for botanists and snail seekers. 

 Here we found a new Phlox (clutei); Oreohelix yavapai cum- 

 ming.n n. subsp. and Gonyodiscus skimeki cockerelli Pils. were 

 found in their most robust form. 



All of the mountain is sandstone, or so near it that shells 

 and their hunters notice no difference. "Cretaceous sand- 

 stones cover the top and Jurassic (?) sediments constitute the 

 flanks," to speak authoritively. The sandstone for the whole 

 region is rather variable in character due perhaps to the several 

 binding materials lime, silicon, iron, manganese, etc. Many 

 specimens were brought to camp, and Prof. Scott's verdict ran 

 to sandstone with an occasional decree favorable to petrified 

 wood. 



Navajo Mountain has good soil for snail life, so fertile it is 

 not probable that all the species were gathered. At a spring 

 on the south slope known to us as the Red Rock Spring, Oreo- 

 helix yavapai clutei n. subsp. was discovered accidentally in the 

 grass and rose bushes. Succinea avara was also here in the 

 bogs. Among the rocks of a large canyon west of Endische 

 Springs we found the bones of Oleohelix yavapai neomexicana 

 Pils., but found no live ones. This canyon heads in a saddle 

 near the main peak of the mountain and for convenience may 

 be known as Big Pine Canyon until further orders. The north 

 and northeast slopes were not fully explored although three of 

 our party camped at War God Springs the better part of a week. 

 The great rock slides of those slopes probably contain the best 

 snaileries. Four Oreohelix tribes per mountain is a new record 

 for Arizona. 



Before returning home Mr. Wetherill and his Indians led the 

 way to the War God Springs and then on foot to the top of the 

 mountain for the view over the San Juan country, and then 



