a day later than the Mahaena snails. 
PARTULA OTAHEITANA. 
203 
Fertility (table 140) is low in the whole series, yet the snails were collected only 
All of the young are plain and dextral; 
possibly the bands develop only later. 
partly grown individuals displaying bands. 
groups of light, medium, and dark brown (plate 29, fig. 48) shells. 
TasLeE 140.—Partula otaheitana affnis. 
Banded 
IMovaov6% 
Records. 
No. of | Percent | No. of | No. of 
gravid. 
gravid. 
eggs. 
young. 
Total 
contents. 
PARAURA VALLEY. 
The collection of affinis representing the thriving colony of the valley comprises 
466 plain adults and 60 similar adolescents, together with 113 banded adults and 13 
for gravid. 
Vahu Valley. Fecundity. 
Average 
Average 
for all. 
The former fall into three subordinate 
Among the last 
is a giant of enormous relative size (plate 29, fig. 49), which was none the less an 
adolescent devoid of the lip; its great degree of growth is emphasized by its contrast 
with a diminutive adult bearing young whose shell is illustrated in figure 33. 
The banded shells are mostly of the zonata type, although a few dubia occur 
also; they fall into two subdivisions, in one of which (plate 29, fig. 50) the bands are 
faint but recognizable, while in the other they are strongly developed (plate 29, fig. 
51), without suffusion over the last whorl, like that observed in Farapa and a few 
other instances. 
| Plain, light.... 
yellow 
brown. 
brown... 
Plain, all 
iBanded........ 
Plain, all 
TaBLe 141.—Partula otaheitana affinis. 
Length. 
mm. 
16.6863 + .0837 
16.4450+ .0554 
16.2509 + .0253| 
Shell. 
Width. 
mm. 
9.8818 + .0560 
9.6600 = .0281 
9.6628 .0133 
MEan VALUE. 
Proportions. 
Dp. ct. 
58.1364 .4445 
58.6800 + .1370 
59.3596 .0793 
Length. 
mm. 
8.9000 + .0694 
8.6760+ .0318 
8.6416 .0147 
Aperture. 
Width. 
mm. 
6.7545 + .0428 
6.6760 .0244 
6.6731+.01145 
Paraura Valley. 
Proportions. 
p. ct. 
75.7728 .3255 
76.9800 + .1337 
77.0902 = .0845 
Length aper- 
ture + length 
shell, propor- 
tions. 
p. ct. 
53.2272 + .2466 
52.5800 + .1186 
53.0702 + .0652 
Tooth, index. 
2.6909 = .0940 
2.0500 = .0575 
1.9412 + .0343 
16.3035 + .0229 
16.3217 + .0464 
16.3071+.0206 
0.4117 + .0592 
-8209 + .0391 
-7009 + .0179 
9.6674 .0119 
9.6186+ .0229 
9.6578+ .0106 
0.2757 + .0396 
-4166+.0198 
-3769 = .0094 
59.1826 .0688 
58.8805 = .1405 
59.1230+ .0619 
STANDARD DEVIATION. 
2.1856 + .3143 
2.0316 + .0969 
2.1979 0561) 
8.6552 + .0133 
8.6576 .0251 
8.6557+.0118 
0.3411+.0491 
-4718+ .0225 
-4088=+ .0104 
6.6757 + .0102 
6.6682 + .0183 
77.0348 .0711 
76.9151 .1623 
52.9674 .0565 
52.8982 + .1125 
| 6.6742 .0090 
0.2105 = .0302 
.3625+ .0172 
-3180=+ .0081 
77.0113 + .0654 
1.6006 + .2302 
1.9823 = .0945 
2.3396 + .0597 
52.9538 + .0505 
1.2129+ .1743) 
1.7584 .0838 
1.8054 .0461 
1.9875 + .0290 
2.0442 + .0532 
2.0000 + .0255 
0.4621 .0664 
-8529 = .0406 
-8645 + .0242 
-7301+.0162 
-7308 = .0328 
-7304+ .0146 
-3785 + .0084 
-3615 + .0162 
.3758= .0075 
2.1867 + .0496 
2.2154 .0993 
.4237 + .0094 
3959+ .0177 
2.1958 .0438 
-4185 = .0083 
-3264+ .0072 
-2885 + .0129 
-3193 + .0064 
2.2604 .0502 
2.5581 + .1147 
2.3226 + .0462 
1.7911 .0357/ 
1.7960+ .0399 
1.7732+ 0795) 
-8616+.0205 
-8382 + .0376 
-8561=+ .0180 
