102 AURIS. 



Similar to ^1. bilabiata, but with the oblique folds of the last 

 whorl far less developed, never extending below the periphery. The 

 secondary sculpture also is less developed, and it is smaller than 

 ordinary specimens of bilabiata. 



This species exhibits two phases or two varieties exactly parallel 

 to those of A. bilabiata, and evidently having the same status. 

 Whether the variations in these species are comparable to the white 

 and the pink mouthed forms of Strophocheilus ovatiis, oblongvs, etc., 

 remains to be seen. I desire merely to direct attention to the ap- 

 parently constant differences observed. 



Typical egregia Jay. PI. 39, figs. 14, 15. 



Peristome white orisabella-yellow, the outer edge of parietal wall 

 yellow or brownish, columella and parietal wall within the flange 

 white. 



Var. nigrilabris Pils. PI. 39, f. 16. 



Flange round the mouth, the whole parietal wall and the colu- 

 mella black. 



A. MELASTOMA Swainsoii. PI. 39, figs. 17, 18. 



Shell perforate or umbilicate, ovate-conic, solid and earthy. 

 White or fleshy-brown, irregularly variegated in coarse pattern with 

 brown, having a paler band below the periphery ; the spire with, 

 purple- black spaces betiveen the folds ; mouth and peristome very 

 dark. Surface coarsely and flatly granulate in irregular pattern, 

 most distinctly so on the base, the granulation obsolete above; spire 

 with a series of strong folds below the suture, disappearing on the 

 body-whorl or on its latter part. Whorls 5, convex. 



Aperture vertical, ovate, black within; lip flatly reflexed, wide, 

 purplish with a brown edge, or blackish-brown, the inner edge of outer 

 and basal margins thickened within, forming a rim or flange, inter- 

 rupted by a squarish notch or sinus at foot of the columella. Colum- 

 ella rounded, curving forward, its inner edge nearly straight, bear- 

 ing a light denticle at base. Parietal wall lined far imnird n-lth 

 intense black-brown. 



Alt. 50-55, diam. 30 mill. 

 Alt. 46, diam. 27 mill. 



Province of Eahia (Swainson) ; environs of Balna (Moricand, 

 Challenger) ; Rio Jitnrirn (Martinez). 



