TABLE 241. Partula otaheitana crassa. Progressive 
colonial variation as regards range and mean value. 
1 2 3 4 5 6 7 8 9 
Southern series occidentalis Northern series aberrans ¢ 
A o 7 = Se Q — 
> > > : 3 2 > = 
& & 2 > 3 > B 6 § 5, 
=] I v a Si = mt = 
ban fastens & sy E = Re od 
B wwele HE 5 Ss oa & 8 a 
= < ) < ay < = a g 
: 
So] 
Shell, length (mm.) 
Aperture width (mm.) 
1 
Aperture, proportions (per cent) 
ions (per cent) 
Shell, width (mm.) 
\ 
| 
Length = ai,” Proportions (per cent) 
sooo oo 
