16 THE NAUTILUS. 



melted. 1 found three Bifid, hordeacella, which I deposited in my 

 spectacle case for want of a better receptacle. I expected the stage 

 every minute, but the Mexican driver was accommodatingly slow, 

 (his poco tiempo is usually mucho tiempo), and 1 had time to gather 

 up a little dirt into my silk muffler, which contained 13 more speci- 

 mens. 



This is a mild climate, but not so much as to make an all night 

 stage ride in the mountains in mid-winter, in an open rig, an un- 

 mixed luxury. We have the same brand of snow and ice that they 

 manufacture up in Minnesota. If the reader will take down his 

 picture of a six-horse Concord stage with a Jehu driver and replace 

 it with one containing a buckboard and a pair of half-starved bronchos 

 or lazy mules and a Mexican driver, who sabes little English and less 

 horsemanship, he will see the real and raw article as it is served up 

 to us on this 22-hour ride. But a plentiful supply of wraps, includ- 

 ing several thicknesses of paper under my vest and a heavy blanket 

 enveloping my head and shoulders, a burning lantern between my 

 feet and an occasional walk or run of a mile or so, served to keep me 

 above freezing point. 



Returning by a different route I halted the stage in a canon of the 

 Ascuras Mountains long enough to gather up into a gunny sack nearly 

 a bushel of drift lodged by the road side, in which over 1,200 shells 

 were found. 



The localities visited have not been thoroughly examined, and 

 many mountain ranges await the first visit of the collector. There 

 is no reason to doubt that further search will yield excellent returns. 



The following new species and varieties have rewarded my efforts: 



Bifidaria perversa Sterki. 



Bijtdaria quadridentata Sterki. 



Bifidaria ashmuni Sterki. 



Bifidaria ashmuni Sterki form minor. 



Bifidaria hordeacella Pils. var. parvidens Sterki. 



Bifidaria dalliana Sterki. 



Pupilla sonorana Sterki. 



Papilla sonorana var. tenella Sterki. 



Ashmunella rhyssa Dall. 



A shm unella miorhyssa Da 1 i . 



Ashmunella ashmuni Dall. 



Ashmunella /ismdodonta Dall. 



