GASTROCOPTA, NORTH AMERICA, WEST INDIES. 



45 



brown, composed of 5^ strongly convex whorls, the last third 

 of a whorl straightened. Striation. faint. The aperture is 

 squarish with rounded angles. Peristome rather broadly ex- 

 panded, thin, brownish, interrupted on the parietal margin, 

 or continuous by a fine thread. Parietal lamella high, its 

 inner end distinctly curving towards the periphery. Angular 

 lamella about half as high as the parietal, slightly sigmoid. 

 Columellar lamella strong, short, its inner half descending 

 somewhat. Palatal plicas all visible in a front view. The 

 upper one is rather high and short, not far within; lower 

 one deeply immersed, partly concealed behind the parietal in 

 a front view; basal plica radial (transverse to the cavity), 

 deeply immersed. 



Length 2.2, diam. 1.1 mm. 



Length 2.5, diam. 1.1 mm. 



Length 2.15, diam. 1.1 mm. Santa Rita Mts. 



Cotypes. 



G. cocliiscHsis. Santa Rita Mts., Arizona. 



Arizona: Chiricahua Mountains, 011 the summit of Cross J 

 Mt., Big Emigrant canyon, about 8000 ft.; White Tail can- 

 yon; Limestone Mountain (Pilsbry and Ferriss). Huachuca 



