TaBLeE 31. Partula clara. Progressive variation of the 
primary varieties as regards range and average value. 
The interrupted line represents the general average. 
Aperture, length (mm.) 
— 
we 
w 
> 
wn 
i) 
“I 
Ge 
.—) 
marmorata 
(Taiarapu) 
marmorata 
(Eastern quadrant) 
prima(?) 
marmorata 
(Southern quadrant) 
(Papenoo) 
incrassa 
minor 
prima 
Aperture width (mm.) 
38 
: 
[12.95 
18,25 
are 
[13.85 
Shell, length (mm.) 
Aperture, proportions (per cent) 
Shell, width (mm.) 
Shell, proportions (per cent) 
Length 2" proportions (per cent) 
