Shell, length (mm.) 
Shell, width (mm.) 
Shell, proportions (per cent) 
TaBLeE 87. Partula otaheitana otaheitana (Fautaua 
Valley) and Partula otaheitana amabilis (Hamuta 
to Ururoa Valleys). Progressive variation of the 
colonies in range and mean value. (Sinistral, 
full lines; dextral, interrupted lines.) 
2 3 
Fautaua V. ™ 
Hamuta V 
Pohaitara V.= 
Ururoa V. = 
Pirai V. 
15.05 
15.35 
15.65 
15.95 
16.25 
16.55 
16.85 
17.15 
17.45 
17,75 
18.05 
18.35 
18.65 
18.95 
19,25 
19,55 
19.85 
20:15 
20.45 
20.75 
21.05 
21.35 
21.65 
21.95 
22.25 
i 
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4a rw ne ee 8 
2 DO 
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