from Central and South America. 497 



over tlie upward extension of tlie last whorl neartlie aperture, 

 so noticeable in the present species, is totally lacking in 

 P. guadtloupensis. 



Planorhls Bourardiana, pp. n. (Fig- 17.) 



Shell depressed, subcaritiate, whitish grey; whorls 4, 

 sculptured with Hue oblique striae ; spire concave ; umbilicus 

 wide, very concave, especially in the centre; peristome 

 simple, very oblique, broadly lunate. 



Alt. 2, diam. maj. 7 inn). 



Aperture : alt. 2, diam. 1-25 mm. 



JJub. Mexico. 



rianorbis meridaensis, ?p. n. (Fig. 18.) 



Shell depressed, suborbicular, dull brown ; whorls 3i, 

 marked with oblique arcuate lines of growth ; right side 

 deeply excavated, especially in the middle ; lett side some- 

 what concave ; peristome acute, a callus on the parietal 

 whorl joining the two margins of the [jeristome ; aperture 

 obliquely lunate. 



Alt. 8, diam. maj. 8 mm. 



Aperture : alt. 3, diam. 1-5 mm. 



JIab. Merida, Venezuela. 



Fhysa balieata, sp. n. (Fig. 19.) 



Shell fusiform, pale yellowish horn-colour, transversely 

 marked with oblique, buff-coloured bands; whorls 6, the last 

 somewhat inflated and sculptured with very fine transverse 

 striae; sutures rather deeply im})ressed ; edge of peristome 

 acute^ a thickening appearing just within the shell ; columella 

 straight, white, descending somewhat obliquely, a very thin 

 callus joining it with the lip above; aperture elongately, 

 inversely auriform. 



Alt. 12"5, diam. maj. G"75 mm. 



Aperture : alt. 8, diam. 3"5 mm. 



JJab. Oaxaca, Mexico. 



Fhysa cornoii, sp. n. (Fig. 20.) 



Shell fusiform, thin, polished, transversely striated with 

 irregular and somewhat distant lines of growth and spirally 

 sculptured with very fine wavy striaj; whorls ;H ; sutures 

 impressed; peristome acute; columella twisted, descending 



