78 ANCEY : ON THE GENUS ASHMUNELLA. 



Ashmunella miorrhyssa (Dali). 



Folygyra miorrJiyssa, Dall : Nautilus, 1898 (Nov.), vol. xii, p. 75. 



Shell depressed, dark brown; about 5^- rounded whorls, the periphery 

 somewhat rounded above the middle of the last whorl; sutures distinct; 

 umbilicus small, deep, narrowing rapidly towards the apex. The sur- 

 face polished, with microscopic revolving striae, and fine, slightly 

 irregularly distributed, oblique transverse ridges. Aperture subcircular, 

 with a reflected, white peristome continued over the body by a thin, 

 translucent callus ; the reflected peristome has an obscure thickening 

 inside the peripheral part, and another more distinct inside the base ; 

 within the aperture is a small, oblique, white parietal tooth. 



Alt. 8-5; diam. i5'5 millim. 



Loc. — Eagle Creek, Sierra Blanca, Lincoln Co., New Mexico, alt. 

 7,500 to 8,500 feet (x^shmun, also Townsend). 



Ashmunella rhyssa (Daii). 



Polygyra rJiyssa, Dall: Nautilus, 1897 (May), vol. xi, p. 2. 



Shell dark yellowish-brown ; whorls 6, rounded and the sutures 

 rather deep ; the spire low but not flattened ; nuclear whorls nearly 

 smooth, the others rather coarsely obliquely striated, the last fourth of 

 the last whorl with rather sharp, elevated riblets with wide interspaces 

 and a marked constriction behind the reflected peristome. The entire 

 surface more or less distinctly finely spirally striate ; the periphery 

 somewhat above the middle of the last whorl ; umbilicus small and 

 deep ; aperture subcircular and oblique, with a reflected and rather 

 solid peristome, a small obscure thickening on its. basal part and a 

 light wash of callus over the body ; slightly within the aperture is a 

 small, oblique, elongated parietal denticle. 



Alt. 9; diam. max. 17, min. 14 millim. 



Loc. — Sierra Blanca, W. New Mexico (Ashmun). 



Ashmunella rhyssa, Dall var. hyporhyssa, Ckil. 

 Nautilus, 1 898, vol. xii, p. 77. 

 Like rhijssa in size and form, but, the umbilicus wider exposing 

 the penultimate whorl ; the sculpture finer, consisting of striae rather 

 than riblets. 



Alt. 9; diam. max. 15, min. 12 "66 millim. 



Loc. — Lower slopes of Sierra Blanca, New Mexico, above head of 

 Ruidoso Creek, in aspen belt, altitude about 9,500 feet. 



The following forms of the variety are also recorded by CockercU'" 



3 Nautilus, 1900, vol. xiv, p. 72. 



