PARTULA OTAHEITANA. 207 
TaBLe 147.—Partula otaheitana affinis. Tehoro Valley. 
Frcunpiry. Herepity. 
Seren Records No. of | Per cent | No. of | No. of | Total | Average | Average Young,| Young, /Young, Total 
| - i ‘| gravid.| gravid. | eggs. | young. |contents.\for gravid.| for all. light. | medium.) dark. i 
f ee re eer 
Plain, light..... 100 88 88.0 136 66 202 2.29 2.02 Adults 
medium.. 57 50 87.7 84 34 118 2.36 2.07 Wighteyer 28 29 12 69 
f darkeenee 92 88 95.6 153 75 228 2.59 2.47 Medium...| 15 18 4 37 
ee | IDEWH eo oa 24 48 34 106 
iPlainvalleaesner 249 226 90.7 373 175 548 2.42 22.0 
Half-banded... 56 51 91.0 86 37 123 2.41 2.19 MRotalnmennr 67 95 50 212 
POO On erOr 277 90.8 459 671 .42 
Haavini VALLEY. 
It is in this region that rubescens preponderates in the otaheitana population, 
while in Tehoro the relation is reversed. Here only 59 adults and 4 adolescents 
were taken, three of the former and one of the latter being sinistral; one of the 
examples illustrated exhibits a ruddy brown color (plate 29, fig. 60), but the rest 
of the reversed and dextral adults are typically yellow-brown or deep brown (plate 
29, fig. 61). Five shells exhibited the bicolored anomala pattern, with a very slight 
difference between the two sides of the median plane. 
TasLe 148.—Partula otaheitana affinis. Haavini Valley. 
Mean VALUE. 
Shell. Aperture. Length aper- 
| Series. No. Sa ceaes a Tooth, index. 
Length. Width. Proportions. Length. Width. Proportions. tions. 
mm. nm. p. ct. mm. mm. Dp. ct. Dect. 
) Dex., plain....... 51 | 15.6500=.0705| 9.3314 .0357| 59.5000+ .1988) 8.4255+.0420) 6.3667 .0296) 74.5392 +.1683| 53.5980 .1727| 1.9216+.0744 
t half-banded.| 5 | 16.0100+.1557| 9.2200+.0980} 57.9000+ .7289) 8.4200+.1119| 6.1800+.0980) 72.7000 .8183) 52.9000 .8658| 1.4000+.1478 
| Dex., all.........] 56 | 15.6821 .0664) 9.3215 .0338) 59.3571 .1968) 8.4250 .0395} 6.3500 .0288] 74.3750 .1763) 53.5357 .1762| 1.8750+.0703 
Sins ep laintererr 3 | 15.0500 .1562) 9.5667+.2407| 63.1667 + 1.3237) 8.1667 +.1943) 6.3000+.1682| 75.8333 +.4857| 55.1667 +1.0704| 1.6667 .1835 
\" STANDARD DEyIATION. 
; Dex splainkess er 51 | 0.7467 .0498) 0.3777+.0252) 2.1051+ .1406) 0.4445+.0297/ 0.3135 .0209| 1.7818 .1190) 1.8285 .1221| 0.7882+.0526 
half-banded.| 5 .5161.1101) .3250+.0693) 2.4166 .5154) .3710+.0791) .3250+.0693) 2.7129=.5786| 2.8705 .6122| .4899+.1045 
1% Dexca leery .| 56 -7363+.0470) .3755+.0239} 2.1829 .1392) .4384+.0279| .3190+.0204| 1.9555+=.1247) 1.9545 .1246| .7806+.0497 
i it SS 
msin., plain. :.... . 3 4242+ .1168) .6182+.1702) 3.3993+ .9360) .4989+.1374| .4320+.1189) 1.2472+.3434| 2.7487 .7569| .4714+.1297 
vhs 
Mths 
broader. 
reversed adults. 
Comparing the dextral and reversed shells (table 148) the latter prove to be 
shorter and stouter, and their apertures are shorter, slightly narrower, but relatively 
It is true that no final conclusion can be based on the figures for only 
three shells, yet the data are significant so far as they are positive. 
Passing by the matter of fecundity (table 149) with a mere reference, and 
taking up the data of heredity, it is found that all of the young are devoid of the 
bicolored pattern and that they are all dextral, even the four produced by the 
Hence the relationship between the sinistral group and the domi- 
