where there was no fresh water to use for the extension of the animals. 
PARTULA OTAHEITANA. 
165 
Therefore 
the statistics of fecundity and heredity (table 108) are few and unsatisfactory, but 
in the latter case they prove that adults of each type of color produce young of the 
contrasted kind as well as their own. 
Series. 
Yellow 
Red orange... 
TasieE 107.—Partula otahettana rubescens, Tautira Valley. 
Length. 
mm. 
20.5326 .0657 
Shell. 
Width. 
mm. 
11.9696 + .0590 
Mean VALUE. 
Proportions. 
p. ct. 
58.3696 + .2822 
Length. 
mm. 
10.6130+ .0387 
Aperture. 
Width. 
mm. 
8.3521+ .0478 
Proportions. 
Pp. ct. 
78.5000 + .3369 
Length aper- 
ture + length 
shell, propor- 
tions. 
p. ct. 
51.8043 + .1964 
20.1651+.0724 
20.0833 = .1522 
20.1568 .0668 
11.8887 + .0453 
11.5333 .1248 
11.8525 + .0436 
59.0095 + .1977 
58.0000 + .5379 
58.9068 + .1877 
10.4811 .0423 
10.3667 + .1131 
10.4695 + .0398 
8.2320 + .0372 
8.0667 + .1119 
8.2153+ .0355 
78.5000 .2106 
78.3333 + .3700 
78.4830 .1928 
51.9321 + .1436 
51.5666+ .4878 
51.9068+ .1381 
20.2622 + .0530 
11.8854+ .0357 
58.7561 +.1577 
10.5098 + .0310 
8.2536+ .0293 
78.4878 + .1903 
51.8780+ .1320 
STANDARD DEVIATION. 
0.4670+ .0464 
0.4195 + .0417 
2.0065 + .1995 
0.2755+ .0274 
0.3400 .0338| 2.3957+.2382) 1.3968+.1389 
| 1.5498 .1015 
1.7717 + .3449 
2.1334+ .1397 
1.9536+ .3803 
-4890 += .0320 
-4533 + .0882 
-7815+ .0512 
.5527+ .1076 
-4568 + .0299 
-4109 + .0800 
-4018 + .0263 
4064+ .0791 
2.2737 + .1489 
1.3438+ .2616 
-7618+ .0472 4974+ .0308) 2.1401 .1327 4537+ .0281) .4053+.0251) 2.1978+.1363) 1.5743+.0976 
All.. -7113+.0375 -4796+.0252) 2.1175+.1115 -4166+ .0219 
3930+ .0207} 2.2554+.1346| 1.5273+.0933 
Young, 
yellow. | red, | 1otal: 
Adults: 
Wellowsrmeneneen 4 1 5 
Red-orange...... 
Redlskyuabe ain j © 2 10 
Rotaltive ty tortie sce 12 3 15 
Average for gravid.... 
Average for all 
AIURUA VALLEY. 
With this valley we reach the limit in Taiarapu of the range of rubescens. In 
Aionifaa Valley, which lies between Tautira and Aiurua, a small collection of only 
19 Partule was obtained, one of which was a typical reddish-orange rubescens; this 
snail we may ignore, in order to pass on at once to the colony in the terminal valley. 
Of 119 adult individuals, 101 belonged to the class distinguished by a yellow 
ground-color; 20 possessed the deeply-tinged spire (plate 27, fig. 50), while 81 were 
clear to the apex (plate 27, fig. 49). The remaining 18 shells exhibited a deep ruddy- 
brown color (plate 27, fig. 51; plate 28, figs. 1 and 2), and they are by far the darkest 
