PARTULA CLARA. 61 
TaBLeE 19.—Partula clara. Tahiti. General characters of 681 adult shells. 
Mode 
Character. Range (class (class Average. Standard 
values). deviation. 
value). 
Shelllersthyym mi aerversy-lareyey > cletetavcr« cvs vecelersvaialsieeers 12.95 to17.45 15.35 15.1694+ .0195 0.7588 .0138 
1G Eb edi MMe seyeysr fey aevestevolisheusy cveneWavetereueteys vere 7.3 9.9 8.7 8.7573 .0109 .4226+ .0077 
DLOPOLtIONS wpelACeN teres 50.5 66.5 58.5 57.6967 .0612 2.3751 .0434 
ANDEMETRE, JETNEAN, NIN 5 cas06000000000000000000 78 10S 8.5 8.5611 .0131 .5077 + .0093 
Tela Stop oc disco DAO OD UUme Bere o83 7.3 6.3 6.3511 .0088 . 3402 + .0062 
proportions, per cent................. 62.5 84.5 74.5 74.1285 .0755 2.9251 .0535 
Length aperture + length shell, proportions, p.ct..| 50.5 66.5 56.5 56.3238+ .0572 2.2160+ .0406 
Region. 
Total population 
Quadrant: 
Total population 
15.1694 .0195 
-7588 = .0138 
TaB Le 20.—Partula clara. 
Mean Vat 
Shell. 
Length. Width. Proportions. 
mm. 
15.0191 + .0352 
15.2111+.0261 
mm. p. ct 
8.4949 + .0193} 56.5472+.1015 
8.8905 + .0121) 58.4169+ .0823 
15.4954 .1008} 8.8515 .0520) 57.0758+.2520 
15.3000 + .0536) 8.9256+ .0260) 58.2820 .1359 
8.7573+ .0109| 57.6967 + .0612 
UE. 
Length. | 
mm. 
| 8.2597 + .0194! 
| 8.6217+.0163) 
| 8.9969 + .0563 
9.0153 + .0302 
Aperture. 
Width. 
6.2082 .0148 
6.3866 .0115 
6.5000 .0400 
6.5615 .0214| 
| 
mm. | 
| 
| 8.5611+.0131| 
6.3511+.0088 
Statistical description by regions. 
Proportions. 
Length aper- 
ture + length 
shell, pro- 
portions. 
Dp. ct. 
75.1051 .1066, 
74.0401 +.1192) 
72.0152 .1713) 
72.4872 +.1318 
74.1285 = .0752 
p. ct. 
54.8648 + .0841 
56.5504 .0656 
58.0151 .2240 
58.9871 .1584 
56.3238 .0572 
STANDARD DEVIATION. 
0.7973 + .0249 
-7111+.0185 
-8585 + .0712 
-7033 + .0379 
2.2980 + .0716 
2.2431 + .0582 
2.1466+.1777 
1.7842 + .0963 
0.4373 + .0136 
-3306 + .0086 
4432 += .0367 
-3410 + .0184 
4226+ .0077| 2.3751 .0434 
0.4379 = .0137 
4436+ .0115 
-4802 + .0398 
-3962 + .0213 
.5077 = .0093) 
-3402 = .0062 
0.3360 = .0104 
-3136+ .0082 
-3411+ .0283 
-2816=.0152 
2.4121+.0753 
3.2474 .0844 
1.4590+.1210 
1.7283 + .0933 
1.9032 = .0594 
1.7886 .0465 
1.9088 + .1584 
1.3469 .0727 
2.9170 .0533 
2.2160 .0406 
We come now to the last and most important stage of the analysis, which 
involves the consideration of the several valley populations almost seriatim. While 
the foregoing statistical treatment of regional populations is valuable, it does not 
bring out the sharp differences between the colonies of neighboring valleys in one 
and the same quadrant. 
color characteristics or in structural details, or in both respects. 
The transitions are often quite abrupt, in the matter of 
To facilitate a 
clear comprehension of the situation, it may be stated here that no less than six 
well-marked varieties can be distinguished, and each of these has a definite territory 
Some of these varieties exist in the newly acquired parts of the entire 
inhabited area, while others are found in the old range as specified by Garrett. 
The distribution of these varieties is charted in text-figure 5; they will be considered 
in geographical order, beginning with those at the northern limit of the western 
area of occupation. 
of its own. 
