496 PROCEEDINGS OF THE ACADEMY OF [Nov., 



here given shows the general positions of localities mentioned in the 

 text. 



The first mollusks collected in the Huachucas were taken by a 

 Mr. Cox, who sent some Helices to Dr. Isaac Lea many years ago, 

 with the locality "Tucson." These shells are what we now call Ashmun- 

 ella varicifera. Nothing is known of Cox beyond his name on the 

 label. At the time these shells were collected Tucson was no doubt 

 the nearest settlement or post to the Huachucas, and hence was put 

 down as the locality. It is not unlikely that Cox picked up these 

 shells in the course of a chase from the army post at Tucson after 

 marauding Apaches. Be this as it may, Ashmunella varicifera is an 

 indubitable Huachucan snail, and was collected at a time when hostile 

 and dangerous Indians occupied that country. On the death of 

 Dr. Lea the specimens came into the possession of the National Museum, 

 where they are now preserved. 



In 1880 Mr. Bland described a snail, Triodopsis levettei (now Ash- 

 munella levettei), collected by Dr. G. M. Levette, and thought to be 

 from near Santa Fe, New Mexico. Explorations in that region have 

 shown that the Ashmunellas there are of a somewhat different type, 

 and the true habitat of the species was not known until Mr. Ferriss 

 rediscovered the species in the Huachucas, where it is restricted to the 

 heads of certain canyons. It is certain, therefore, that Dr. Levette 

 had forgotten where he procured the original specimens, which are 

 now in the American Museum of Natural History, New York. 



The first snails actually reported from the Huachucas were collected 

 by Dr. Edgar A. Mearns, U. S. A., a member of the party surveying the 

 Mexican boundary in 1892-1894. They were described by Dr. W. H. Dall 

 in two papers, 2 published in 1895 and 1896. Six species were obtained 

 in the Huachuca range : 3 



Polygyra levettei [ = Ashmunella I. angigyra]. 

 Polygyra mearnsi [ = Ashmunella mearnsi]. 



Epiphragmophora hachitana, depressed variety from Tanner Canyon 

 [ = Sonorella dalli]. 



Patula strigosa var. [ = Oreohelix s. huachucana]. 



2 Diagnoses of new mollusks from the survey of the Mexican boundary, in 

 Proc. U. S. Nat. Mus., XVIII, 1895, p. 1, and Report on the mollusks collected 

 by the International Boundary Commission of the United States and Mexico, 

 1892-1894, same Proc, XIX, pp. 333-379. 



3 Dr. Dall's pioneer work on southern Arizona shells was published prior to the 

 anatomical researches which led to the establishment of new genera for the 

 Helices of that region. He had only dry shells to deal with, and hence followed 

 the generic nomenclature current at that time. 



