AEROPE. 131 



oblique!} 7 flattened above, more convex below, umbilicus mod- 

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



Natal, So. Africa. 



Yar. ( 9, MINOR. Stria? less marked. 



Mr. Birmey 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 HJn/tida. 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, 18GO. 



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 pearl}' w r ithin. Diam. 51, alt. 30 mill. 



Gape of Good Hope. 

 Yar. WESSELLIANA, Maltzan. Fig. 14. 



Covered perforate, last whorl more obliquely depressed, incre- 

 mental stria3 smaller ; aperture oblique. 



