1905.] NATURAL SCIENCES OF PHILADELPHIA. 211 



MOLLUSCA OF THE SOUTHWESTERN STATES, I: Uroooptidae ; Helicidse of 

 Arizona and New Mexico. 



BY HENRY A. PILSBRY. 



In these papers the molhisks collected by Mr. James H. Ferriss and 

 the writer in the expedition made in 1903 and l)y Mr. Ferriss in two 

 visits to Arizona in 1902 and 1904 will be discussed. The present contri- 

 bution deals chiefly with Mr. Ferriss' researches in Arizona, where an 

 extraordinarily rich and varied snail fauna was found in the canyons of 

 the Chiricahua and Huachuca Mountains. In the study of these mate- 

 rials I have worked over many specimens received from the late E. H. 

 Ashmun, who first made known to us the richness of the Arizona snail 

 fauna, and from Prof. T. D. A. Cockerell, whose unceasing labors on 

 the fauna and flora of New Mexico are familiar to all naturalists. The 

 treatment of the genus Ashmunella has been made practically mono- 

 graphic. 



It is unfortunate that no good topographic survey of southern Ari- 

 zona has been published. It is extremely difficult at present to deter- 

 mine some localities given by previous naturalists, or to clearly indi- 

 cate the positions of those explored by Mr. Ferriss. The accompanying 

 sketch of the canyons explored in the Huachucas makes no pretensions 

 to cartographic accuracy beyond showing the relative positions of the 

 localities mentioned in the text. From Fort Huachuca to Ramsey 

 Canyon is 10 miles; to Carr Canyon 14, and to Miller Canyon 20 miles. 

 Manilla mine is 6 miles from Fort Huachuca. The range is about 30 

 miles long and 6 wide. 



Of the Chiricahuas, it may suffice to say that Bar or Bearfoot Park 

 's on the summit, and is believed to lie at 8,500 feet elevation. There 

 was a sawmill there in 1904. From it toward the southwest Sawmill 

 Canyon leads, and Cave creek flows down from the opposite side. 

 This must not be confused with Cave Creek Canyon in the Huachucas. 

 Fly Park, the type locality of Ashmunella chiricahuana, is on the same 

 mountain, farther south about two(?) miles. Cave creek is 30 miles 

 from Nine-Mile Canyon, and 20 miles from Fort Bowie. Mr. Ferriss 

 has given notes on the general conditions of collecting and on the coun- 

 try in the Nautilus for September, 1904. 



Some considerations of general interest to evolutionists are touched 



