40 



HENRY CLIFDEN BURNUP. 



affecting the gradual evolution from the Tongaat form to the 

 variety mane a, that I have endeavoured to trace out above, 

 occurs at Eshowe, Zululand. Mr. Ponsonby has placed in my 

 hands for determination three examples of this form, Avhich I 

 propose to distinguish as a separate variety, c^lata. 



Var. CEelata n. PL III, figs. 15, 16, 17. 



Shell like elliptica, typical, but rather larger, more obese, 

 with peristome rather thinner and less reflexed, covered all 

 over, except the earlier whorls and the body-whorl above the 

 aperture, with most delicate, fine, oblique strife becoming- 

 stronger on the last half -whorl, Avhere, however, they are not 

 so strong as those in a similar position in the typical form. 



Height 4-06, width 2-11 mm. 



Hab. — Eshowe, Zululand (Ponsonby). 



The other two specimens are not so obese as the type of the 

 variety, which was chosen as being the best developed speci- 

 men. Thus, while they agree better with elliptica, typical, 

 in contour, they are more divergent in their still greater 

 height and yet thinner peristome. In all three the distinctive 

 sculpture is clearly seen by the aid of a strong lens. 



The following additional measurements will help to convey 

 an idea of the variation as to size : 



