14 



THE NAUTILUS. 



in the item of shade, and in Dry Creek it was but a stone's 

 throw from one colony to another for two or three miles. The 

 small stone-fields with sufficient depth contained the most liv- 

 ing examples, perhaps because these contained the shortest 

 routes to the outside feeding grounds. Where the trees had 





Fig. 1. Tracing reduced one-half from U. S. G. S. Topographic Map, 

 MogoUon Quadrangle, edit, of June, 1912, showing locations of snail colonies, 

 numbered 37 to 80. 



fallen and let in the sun dead shells were numerous. In one 

 thickly inhabited slide, no living specimens remained. 



If one of the moulds or a mouse or a chipmunk family moves 

 in, there is trouble in snaildom. Otherwise, with a well-drained 

 rock pile, not too deep nor too shallow, a little leaf mould and 



