PARTULA OTAHEITANA. 
273 
The full table of statistics (table 228) shows that the series from the lower situ- 
ation (1907) comprises shells that, as compared with those of the more inland region, 
are longer, wider, and stouter, with longer and wider but less rounded apertures. 
Both series have the tooth well-developed. 
phea, 1907... 
cestata, 1907. 
All, 1907.... 
phea, 1908... 
cestata, 1908 . 
All, 1908.... 
phea, 1907... 
cestata, 1907. 
All, 1907.... 
pheea, 1908... 
cestata, 1908. 
All, 1908.... 
Length. 
mm. 
17.7263 + .0586 
18.4000+ .2101 
17.7567 + .0559 
TABLE 228.—Partula otahettana crassa. 
Shell. 
Width. 
mm. 
10.6401 + .0340 
10.7666 + .1374 
10.6458 + .0331 
17.0500 + .0863 
17.6500+ .2753 
17.0786 + .0840 
Mean VALUE. 
Proportions. 
p. ct. 
59.9960 .1433 
58.0000 + .6506 
59.9060 .1420 
Length. 
mm. 
9.5629 + .0316 
10.0000+ .1221 
9.5828+ .0311 
7.2053 + .0253 
Orofere 
Aperture. 
Width. 
mm. 
7.1960 + .0256 
7.4000+ .1262 
Valley. 
Proportions. 
p. ct. 
75.2693 + 
74.5000 
-1496 
-6930 
75.1391 .1481 
Length aper- 
ture + length 
shell, propor- 
tions. 
p. ct. 
53.8937 + .1044 
54.1666 + .5430 
53.9068 + .1034 
Tooth, index. 
3.2969 + .0491 
3.5000 + .1377 
3.3060 .0473 
10.1000 .0515 
10.1666 .2570 
10.1031 + .0505 
59.1333 .2776 
57.5000 .3180 
59.0555 + .2665 
9.2333 .0481 
9.1000 .1272 
9.2269 + .0463 
7.0079 + .0406 
7.0100 .0414 
6.9666 + .2044: 
17.5388 + .0490 
0.9799 + .0414 
.7632 + .1486 
-9567 = .0395 
10.4714+ .0303 
0.5861 + .0240 
4990+ .0971 
-5658 + .0234 
59.6327 + .1303 
STAN 
2.3939 + .1013 
2.3627 + .4600 
2.4280 .1004 
-9914+ .0610 
7071+ .1954 
-9881 = .0594 
.5910+ .0364 
-6599 = .1817 
5947 + .0357 
9.4684=+ .0271 
DARD DEVIATION. 
0.5281 + .0223 
4435 + .0863 
-5322 + .0220 
75.7666 .2275 
76.1666 1.4687 
75.7857 .2278 
54.0666 = .2099 
51.5000 .3180 
53.9444 + .2056 
3.2667 + .0779 
3.6667 + .1836 
3.2381 + .0753 
4322+ .0179 
7.1418+ .0220 
0.4288 + .0181 
4582 + .0892 
75.3469 .1252 
2.5001 .1058 
2.5166+ .4900 
2.5320+ .1047 
53.9184 = .0965 
1.7441+ .0738 
1.9720 .3839 
1.7681 +.0731 
3.2842 + .0402 
0.8231 + .0347 
.5000+ .0945 
-8124+ .0334 
3.1879 + .1963 
-8165 + .2248 
3.1359 + .1884 
-5534+ .0340 
.3266 + .0899 
5455 + .0327 
4778+ .0287 
4753 + .0293 
-5249 + .1445 
2.6132+ .1608 
3.7715 + 1.0385 
2.6811 .1611 
2.4109 + .1484 
-8165 + .2248 
2.4190 + .1454 
-8945 + .0551 
A714 .1298 
8858 = .0532 
1.0175 + .0346 
TaBLeE 229.—Partula otaheitana crassa. 
.6286 + .0214 
2.7053 + .0921 
.5617 = .0192 
4568 + .0155 
2.5984 .0885 
Orofere Valley. Fecundity. 
2.0021 + .0682 
8372+ .0284 
: No. of | Percent| No. of No. of Total Average Average 
Series. Records. gravid. | gravid. eggs. young. | contents. | for gravid. for all. 
phea, 1907....... 110 71 64.5 91 47 138 1.94 1.25 
cestata,1907...... 4 3 75.0 6 2 8 2.67 2.00 
INU, WOOD ooo 66006 114 74 64.9 97 49 146 1.97 1.28 
phea,1908....... 58 43 74.1 67 32 99 2.30 5 fil 
- cestata,1908...... 3 2 66.7 1 1 2 1.00 0.67 
INV NOOR, 66660010 61 45 73.8 68 33 101 2.24 1.66 
Recognizing the uncertainty of the figures relating to the cestata class, it is 
interesting none the less that its components are larger in both the inland and out- 
ward collections. The data referring to the aperture show a divergence of cestata from 
phea in opposite directions in all three determinations, and the same is true of the 
figures for the relative length of aperture and shell. ‘These facts signify a sporadic 
production of banded shells from widely different pha parents. 
