PARTULA OTAHEITANA. 267 
III. 4 collective description of the whole primary variety gives the basis for its 
comparison with other subspecies. The dextral shells are not everywhere present 
and are not numerous enough to figure in this combined description. As before, 
two modes of effecting the consolidation are to be employed, with slightly divergent 
results (table 222). When the original data are united into one series, the result is 
a precise definition of the subspecies as it exists in the entire area of occupation. 
Viewing each colony as a genetic unit, the average of valley types gives a summary 
with a different biological significance. The color-characters of the primary variety 
as a whole are presented with sufficient fullness in the earlier description (table 196). 
TasLe 220.—Partula otahettana sinistralis. Progressive comparison of colontes, sinistral shells. Differences in mean value. 
Aperture. Length aper- 
ture + length 
Shell. 
“NGG. |= Sae EET GELICn ne Tes] Rann SF a | as shell, propor- 
Length. Width. Proportions. Length. Width. Proportions. tions. 
{Taharua]. mm. mm. p. ct. mm. mm. p. ct. p. ct. 
~1.3048-+.0377| —0.4384-+.0200| +1.6196+.1014 | —0.6119=+.0227 | —0.4549+.0176 [+ 0.1967 .1324]| + 0.3090+.0869 
-_ — .5952+.0339| — .5863+.0183| —1.4319.0998 | — .3288+.0189| — .2230.0157| + .2378+.1151 |[— .1420-+.0785] 
. 3 4+ .1811-.0314| + .2285+.0172| + .7640+.0963 | + .1974-.0172| + .1609+.0146 [+ .1937.1065]| + .6165+.0720 
— + 1628+ .0674| + .1028+.0395 [+ .1293-+.2070]| + .1094+.0372 [+ .0146+.0294] — .7917+.2388 |[+ .2098-©.1623] |[ 
“ae — .3123+.1279[-+ .0395-+.0640]| +1.3721-+.3289 |[-+ .0226+.0802]| + .1303+.0614| + 1.3874.3539 | + 1.1421.2721 | 
— 41.5118 .1173] + .2538+.0569| —3.6211+.2862| + .3595.0243| + .2007+.0578| — .9981-.3064 | — 2.5351+.2405 |[ 
wae + .3428.0510) + .3291+.0262| + .8171+.1406| + .3171+.0282| + .2098+.0228|[— .2162.1728]| + .7499+.1073 |[ 
— — 5337+ .0565[— .0129-+ .0283]| +1.6283+.1652 | — .2139+.0332| — .0543.0264| + 1.1605+.2088 | + .3418-+.1423 
_ — 4600 .0841| — .4144+.0401 | —1.1330+.2280| — .3760+.0430] — .4217+.0385| — 1.4811+.2896 | — .8755-+.1983 |[ 
_ 4 .2539-+.0790| + .2888.0371| +1.0121+.2085 | + .2503+.0384| + .1381.0356| — .6071+.2583 | + .7886-+.1797 
i 4+ .8096.0572| + .4284-+.0282|[— .1932-.1509]] + .4171+.0319| + .3375+.0253|[+ .2727.1852]|[— .0342+.1290] 
aipuarii.. 
TaBLeE 222.—Partula otaheitana sinistralis. Collective description, sinistral shells. 
(No. =2603, tooth : 2608). 
Mean value. Standard deviation. 
Character. 
Combined Average of Combined Average of 
series. valley types. series. valley types. 
Saciil lenin, WM. cocooaoaconedoo0gdc0000UCbo0000H0 17.4493 .0139 17.5756 1.0549+ .0098 0.7847 
wid €hiebrn Il eesteyeys aerate aioe meialonsteleserscs ca steuchs 9. 8536+ .0073 9.9378] .5553+.0051 .4019 
ROPDOANOIN, JN? CME oo odo GGaD0000000000000 56.4063 .0312 56.5029 2.3578+ .0221 2.1952 
AMpercuresength eminence 8.9975 .0074 9.0793 .5628=+ .0052 .4397 
Vahey Shins pa aodo moun aan pmenaccimns 6 ote 6.8536 .0057 6.9122 .4345+ .0040 .3589 
ORONO MHLOVNGH, folele CEE ooo G00000000000000¢ 76.1162 .0355 76.0793 2.6868 .0251 2.5903 
Length aperture + length shell, proportions, per cent. ..} 51.4573 .0237 51.5788 1.7954+ .0167 1.7775 
ARGO sh HENGE 5.5 600 00000000000000000000000000000000 2.5943+ .0122 2.3709 .9277+ .0086 . 7146 
Tooth, index. 
+1.3226+ .0330 
+ .2129+.0298 
+ .1698+.0245 
— .1591+.0866] 
+ .0300+ .1236] 
+ .0338=+ .0980] 
— .0449+ .0487] 
—1.3327+.0777 
+ .0391=.0963] 
— .1719+.0824 
— .4123+.0368 
