

108 
TABLE 56.—Partula gibba, Saipan. 

Series. 
Puntan Flores: 
WNicolors =.2.21s slosh. 
Bicolor faci ccchwros as © 
mitella-rubra.......... 
castanea-rubescens..... 
Sadog Tase: 
WBICOION A tab .ate ce eles 
bicolor 0.7.5 + Hee ages 
roitellae2. eerste 
castanea-rubescens..... 
Puntan Muchut: 
MENICOLON eae ss eens aoe 
bicolor sf. 40: Anton izes 
MOL CCH Sees oR ie ate 
mitella-rubra.......... 
castanea-rubescens..... 
Fanaganam: 
anicolor } i idnie Sera ciekin 5 
bicolor s..2..04 S2ae eck 
castanea-rubescens..... 
castanea-purpurescens.. 
Torre: 
bicolor, 34,05. S96 se 
Astaman: 
unicolor.{) 2.3. Ges es 
bicolor) OX cet aeed 
mitella-rubra.......... 
castanea-rubescens..... 
Garapan: 
bicoler 5... a8. 8 
mitella’) X61 oree wee 
castanea-rubescens.... . 
castanea-purpurescens. . 
Chalankiya: 
unicolor..A ab seiko ase 
mitella-rubra.......... 
castanea-rubescens..... 





Length. 
mm. 
0.6833 +.1629 
.7354+.0365 
-5880 +.0248 
.6877 +.0909 
.6240 +.0425 
-6497 +.0191 
-7558 +.0430 
-6807 +.0900 
.6277 +.0389 
0 
.6597 +.0365 
-6608 +.0595 
.7667 +.0838 
.5727 +.0569 
.7717 +.0867) 
-8785 4.0252 
-9847 +.0930 
3873 +.0754 
.7321+.0417 
.7469 +.1126 
-7133 +.0283 
4971 +.1185 
-8004 +.0925 
-6380 +.0165 
-5826 +.0396 
-6818 +.0266 
-6685 +.0455 
.5004 +.0319 
-3980 +.0490 
-2449 + .0674 
0 
"7264 +.0174 
(8694 4.0389 
(6735 +.0858 


STANDARD DEVIATION. 
Shell. 
Width. 
mm. 
0.4690 +.1118 
-5394 +.0268 
-4929 +.0220 
-5343 +.0706 
4589 +.0312 
5455 +.0161 
5471 +.0312 
-4258+.0563 
-5291 +.0328 
.3000 +.1012 
-5061+.0281 
.4221+.0380 
.5675 +.0621 
4265 +.0424 
-6859 +.0715 
-5398 +.0155 
-5025 +.0479 
.2212 +.0430 
-5279 +.0300 
-5845 +.0881 
-5518+.0219 
-7000 +.1669 
.5620 +.0650 
4914+.0217 
-5335 +.0208 
-5584 +.0380 
4716 +.0300 
4657 +.0573 
5249 +.1445 
0 
-4792+.0115 
.5120 +.0230 
3699 +.0471 



Proportions. 
Pp. ct. 
2.1794+4.5197 
2.0706 +.1029 
2.1603 +.0965 
1.9369 +.2562 
2.0938 +.0906 
1.9775 +.0583 
1.9006 +.1083 
1.9430 +.2570 
1.5543 4.0965 
1.5000 +.5058 
2.1279 +.1179 
1.9753 +.1780 
1.8323 +.2004 
1.4407 +.1422 
2.0405 +.2294 
2.6639 +.0763 
2.2393 4.2136 
0.5773 .1123 
1.8856+.1075 
2.31514.3491 
2.3013 4.0914 
3.5355 +.8431 
2.7851 +.3221 
2.2812 +.0591 
2.1635 4.1473 
2.3190 +.0904 
2.0763 +.1414 
2.2528 +.1435 
2.3907 +.2943 
2,4940 -+.6867 
0 
2.1574 +.0519 
2.1946 +.0984 
1.8927 +.2412 


4257 +.0290 



VARIATION, DISTRIBUTION, AND EVOLUTION OF THE GENUS PARTULA. 
Statistical description of the color-classes (cont.). 


Length aper- 
ture + length 
shell, propor- 
tions. 
p. ct. 
1.0897 +.2598 
1.4275 +.0710 
1.5581 +.0696 
1.7372 4.2298 
1.6859 +.1148 
1.4209 +.0419 
1.8019 +.1027 
1.4429 +.1908 
1.4739+.0915 
0.5000 +.1686 
1.7014 +.0943 
1.3108 +.1181 
1.1040 +.1208 
1.2809 +.1273 
1.6329 +.1835 
2.1487 +.0616 
1.6000 +.1526 
1.3437 4.2616 
1.7508 +.0998 
1.6852 +.2541 
1.7546 +.0697 
2.8614 +.6823 
1.5760 +.1823 
1.7827 +.0462 
1.4808 +.1009 
1.5751 +.0614 
1.6549 +.1127 
1.6899 +.1077 
1.9137 4-.2357 
0.4714+4.1298 
0.5000 +.1686 
1.5738 +.0378 
1.8137 +.0814 
1.2365 +.1576 
Aperture. 
Length. Width. Proportions. 
mm, mm, Pp. Ct. 
0.4975+.1186} 0.2828+.0674) 1.4756+.3518 
4291 +.0213 .3548+.0176| 2.2941+.1140 
.3751+.0167 .3405+.0152} 2.2357+.0998 
-3419 +.0452 3495 +.0462| 2.1178+.2801 
.3660 +.0249 .3029+.0206| 2.0099+.1369 
.3519+.0104 .3177 +.0093} 2.0899+.0616 
4398 +.0250 .3492+.0198| 2.4186+.1379 
4088 +.0541 .3812+.0505| 2.2479+.2973 
-3543 +.0220 .3211+.0199| 1.7457+.1084 
.1000 +.0337 -2000 +.0674|} 2.5000+.8431 
.3793 4.0210 .3029+.0167|} 1.9876+.1101 
-3940 +.0355 .3954+.0356| 1.8719+.1676 
-4081 +.0446 .3488+.0382| 2.6431+4.2892 
-3334+.0331 .2977+.0295| 2.3276+.2314 
.4206 +.0472 -4109+.0462|} 2.0131+.2263 
.4259+.0121 .3090 +.0088} 2.0862 +.0597 
4333 4.0413 .2824+.0269| 2.4547+.2341 
.2427 +.0472 .0943 +.0183} 1.6997 +.3309 
-4185 +.0238 -3201+4.0182| 2.3642+.1348 
4749 +.0716 4271+.0644| 2.7640+.4165 
4041 +.0160 .3339+4.0132| 2.1451+.0852 
5171 +.1233 4555+.1086| 2.0000 +.4769 
4385 +.0507 -4199+.0488} 2.5546+.2955 
.3416 +.0088 -2696+.0070} 2.1052+.0545 
3120-+4.0212|  .2608+.0177| 2.7091+4.1845| 1.4808-+.1009 
.3931 +.0153 .3366+4.0131| 2.2032 +.0859 
4257 +.0290 3502 +.0238]) 2.0991+.1430 
3599 +.0229 .3183 4.0203} 2.1109+.1345 
3409 +.0419 .2828+.0348| 2.1664+.2668 
.1886+.0519 1886+.0519} 0.4714+.1298 
.2000 +.0674 .0 1.5000 +.5058 
.3721+.0089 .2976+.0071| 2.0507 +.0252 
.4731+.0212 .3277+.0147} 1.9819+.0889 
.3200 +.0408 .2332+.0297| 2.0066+.0435 

ities of the two classes; the same is true for the other characters of the two classes, 
and for the quantitative characters or the remaining color-classes as well. 
general, the statistical qualities of the color-classes, like the distinctive forms of 
coloration themselves, disclose no relation to ecological conditions that would 
indicate a causative value of such external influences. 
The colors of the lips in the several classes are recorded in summary form in 
table 57. The obvious points are (1) the unicolor shells are universally white in 
this respect, (2) the bicolor and mitella shells are predominantly yellow, (3) the 
In 
