ANCEY : ON THE GENUS ASHMUNELLA. 77 



the last whorl constricted behind the lip and somewhat descending; 

 umbilicus deep and narrow, showing a part of the penultimate whorl 

 near the aperture ; aperture oblique, with a narrow strongly reflected 

 lip of a livid whitish colour ; the pillar and outer Hps connected in 

 fully matured specimens by a smooth callus ; the outer lip is flexuous, 

 receding near the periphery, and more vertical near the base. 

 The aperture is destitute of teeth, but, sometimes (in Jemez mountain 

 specimens) there is an obsolete parietal denticle and occasionally an 

 obscure thickening on the basal edge, in one specimen from this 

 locality the edge is flexuous within, recalling that of A. pseudoilunia, 

 but not notched. 



Alt. 77 ; diam. max. iS, min. i4"8 millim. 



Loc. — Fly Park, Chiricahua Mountams, Arizona, at an elevation of 

 10,000 feet (Fisher); Jemez Mountains and Jemez Sulphur Springs, 

 '&.\W. of Santa Fl', New Mexico, alt. 8,000 to 10,000 feet (Ashmun) ; 

 near Tucson, Arizona (Cox). 



The specimens from Chiricahua Mountains which may be regarded 

 as typical, are rather more elevated and perhaps a trifle more tightly 

 coiled than those from New Mexico, and are entirely destitute of 

 teeth. Those from near Tucson are large, much depressed, more 

 yellow, and the examples before me with pale varices marking stages 

 in the growth of the shell ; the whorls appear to be slightly less in 

 number, and the aperture is edentulous. It seems to be at least a 

 local race and I name it var. varicifera. Further investigation may 

 perhaps prove that it is distinct. 



Ashmunella altissima (Cockerel!). 



Nautilus, 1898, vol. xii, p. 76. 



Shell with 5?, whorls, pale yellowish-brown; sutures moderately 

 deep ; spire flattened and low, periphery rounded ; apical whorls 

 nearly smooth, and with little sculpture as far as the middle of the 

 penultimate whorl, after which the shell becomes distinctly and strongly 

 obliquely ribbed, the ribs near the aperture being particularly strong, 

 the last whorl has about 48 of these ribs ; umbilicus narrow and deep ; 

 aperture obliquely semilunar ; the peristome subcircular, except where 

 interrupted by the parietal wall, strongly thickened, recurved with a 

 sharp edge, yellowish white, and without teeth; no parietal denticle. 



Alt. 6 ; diam. max. 12, min. 10 millim. 



Lor. — Highest summit of White Mountains (Sierra Blanca), Lincoln 

 Co., W. New Mexico, alt. 11,092 feet (Townsend). 



Much smaller and flatter than A. rliyssa, with the aperture more 

 narrow and the last whorl less evenly rounded. 



