AEROfE. 131 



obliquely flattened above, more convex below, -umbilicus mod- 

 erate, perspective. Diam. 12, alt. 6 mill. 



Natal, So. Africa. 

 Var. /9, MINOR. Strias less marked. 



Mr. Blimey writes of this, that it " is placed by von Martens in 

 Pella, a subgenus of Helix. On examining the animal, however, 

 I find it has no jaw, and that its lingual membrane presents the 

 usual characters of Rhytida. Mr. Gibbons informs me ' that the 

 animal wants the characteristic labial palpi of the latter genus.' 

 There appears to be no central tooth." (Ann. N. Y. Acad. Sci., 

 355, 1879.) 



Genus AEROPE, Albers, 1860. 



A. CAFFRA, Ferussac. PI. 25, figs. 13, 14. 



Perforate, inflated, thin, fragile, costulate-striate ; greenish 

 irregularly strigate with greenish brown ; whorls 4 ; aperture 

 large, somewhat pearly within. Diam. 51, alt. 30 mill. 



Gape of Good Hope. 

 Yar. WESSELLTANA, Maltzan. Fig. 14. 



Covered perforate, last whorl more obliquely depressed, incre- 

 mental striae smaller ; aperture oblique. 



