1909.] 



NATURAL SCIENCES OP PHILADELPHIA. 



505 



Ashmnnella varicifera Ancey. Fig. 4. 



Polygyra chiricahuana, in part, Dall, Proc. U. S. Nat. Mus., XIX, pi. 32, 



figs. 9, 10, 12. 

 A. chiricahuana var. varicifera Anc, Journ. of Malacology, VIII, Sept. 30, 



1901, p. 77 (near Tucson, Cox). .4. /. heterodonta or chiricahuana, Pilsbrv, 



Proc. A. N. S. Phila., 190.5, p. 242, pi. 15, figs. 94, 95. 



The shell is depressed, the spire low, varying from convex to low- 

 conoidal, the periphery of the last whorl situated above the middle, 

 obtusely subangular in front. Color rather light-brown and opaque; 

 or corneous-brown and somewhat transparent (sometimes pure white). 

 Surface rather glossy, lightly marked with growth-lines and faint 

 traces of incised spiral lines. Umbilicus rather narrow but open. 

 Aperture oblique, at about 45° with the axis. Peristome rather narrow, 



Fig. 4. AshmuneUa varicifera Ancey. 



reflexed, recurved at the edge, having a low, indistinct thickening of 

 the inner rim of the outer lip, and sometimes the very slight indication 

 of an outer basal tooth. 



At resting stages young shells form a callous thickening within the 

 lip, which shows through as a radial streak in some adult shells. 



Alt. 8, diam. 16V to 17 mm.; whorls 5^. 

 " 10^, " 18V " " 6. 



South side of Miller Canyon near its head; Wickersham Rock, Miller 

 Peak, and in the east fork of Cave Creek Canyon; also a mountain on 

 the south side of the mouth of Ash Canyon. These localities, except 

 the last, are indicated by three areas of vertical shading on the map. 

 Miller Peak is about 9,800 feet high. 



This species has not been fully described before. The "varices" to 

 which the name is due are only occasionally present in adult shells. 

 They are also seen in A. chiricahuana, which is so similar that until 

 now the Chiricahuan and Huachucan snails were supposed to belong 

 to one species. The soft anatomy shows at once that we have to do 

 with two species. A. varicifera has genitalia exactly like A. levettei 

 except that the epiphallus is somewhat shorter. The spermatheca is 

 not differentiated from its duct, the whole form a long somewhat 

 33 



