88 
VARIATION, DISTRIBUTION, AND EVOLUTION OF THE GENUS PARTULA. 
ferentiated so as to acquire the distinctness of taxonomic varieties. It is especially 
important that this is true for the proportionate measures as well as for the direct 
dimensions, because the statement is made in the literature that bicolor is less 
gibbous than its associates; variations in shape as well as in size occur almost 
indifferently in all color-classes. 
The general accord which is displayed by the component classes of a highly 
diversified association such as that of Macajna second or of Lolo indicates the 
absence of physiological barriers to free intercrossing on the part of such con- 
stituents. 
support the same conclusion. 
Series. 
Tumon: 
snitella fot. cer 
Oco: 
bicolor....... 
miutellay: « ov.e.c 
mitella-rubra.. 
vespera-rosea.........+-. 
vespera-cyanea 
Timoneng: 
bicolor... . 
mitella-rubra.. 
marginata.... 
Agafia: 
castanea-purpu 
vespera-cyanea 
Cemetery: 
mitelle;..00t 
Presidio inner: 
mitella ....<.<.' 
Presidio outer: 
mitella isis aces 
rea..... 
wet ee nee 
ee 




TABLE 40.—Partula gibba, Guam. Coast Central Region. 
Length. 
mm, 
17.3000 +.0715 
17.3000 +.0715 
16.7653 +.0788 
16.5500 
16.1000 +.0715 
16.5500 +.2861 
16.7000 +.0836 
Shell. 
Width. 
mm. 
11.7000 +.0477 
11.2000 +.0477 
11.5000 +.0545 
11.7000 
11.5000 +.0954 
10.8000 +.2384 

11.3714+.0662 
68.0000 +.7154 
67.9286 +.4072 
MEAN VALUE. 
Proportions. 
Pp. ct. 

64.5000 +.0 
68.6428 +.2123 
69.5000 
71.0000 +.2384 
65.0000 +.2384 
Length. 
mm, 
10.0000 +.0477 
9.3000 +.0954 
9.3857 +.0938 
9.3000 
9.3000 +.0 
9.0000 +.1431 
9.3000 +.0578 
16.3250+.2661 
16.4643 +.0977 
16.6250+.1728 
11.3500 +.1277 
11.6143 +.0600 
11.2500 +.1390 
69.5000 +.3894 
70.3571 +.2868 
67.7500 +.1686 
9.3500 +.0645 
9.6428 +.0525 
9.8000 +.1404 


Aperture. 
Width. 
mm. 
7.2000 +.0477 
6.8000 +.0477 
7.0428 +.0591 
6.9000 
7.1000 +.0 
6.6000 +.1431 
6.9428 +.0475 
6.8500 +.0645 
7.2714 +.0504 
6.9500 +.1152 
7.0733 +.0506 
72.0000 +.7154/57.5000 
74.6428 +.3531/55.6428 4.2797 
70.7500 +.3228/59.0000 +.3372 
The statistics of heredity, considered in the next section, strongly 






Length aper- 
ture + length 
shell, propor- 
Proportions. tions. 
p. ct. Pi chy 
+.4769 

73.0000 +.2384|53.5000 +.4769 
75.3571 +.5689/55.9286 +.3568 
74.5000 55.5000 
75.5000 +.4769/57.5000 +.0 
73.0000 +.2384/55.0000 +.2384 




73.2500 +.5761|57.2500 +.3228 
75.3571 +.4184|/58.5000 +.4309 
73.5607 +.4144/58.3000 +.2577 
SS eee ee eee ee ee 
—— |__| | LL | = | LL. | 
16.6769 +.0796 
16.5500 
16.8000 +.1383 
11.6692 +.0604 
10.5000 
11.5667 +.0936 
69.9231 +.2962 
63.5000 
69.0000 +.6698 
9.7231 +.0442 
9.5000 
9.7333 +.0740 
7.1846 +.0313 
6.7000 
7.0667 +.0205 



73.7307 +.2414/58.3462 +.1586 
70.5000 56.5000 
72.6667 +.4612/58.1667 4.3784 
73.4394 +.2219|58.2576+.1475 
—>SSso"—————SSS_ _ESE=|a==ayTeysyeleS>[«d =eleeEE=L]]=aBahn»=a=a==_S_d«OE _ =—LLL—LlIEE==aanaa[[==E"=_=aEE=«&GPL==L——_=aE™"——. OE _ SS Oo le 


17.0072 4.1346 
17.1107 +.0360 
17.1500 +.1431 
16.2500 
17.7500 +.1012 
17.1089 +.0344 
16.6053 +.0793 
16.0855 +.0461 

17.0800 +.0686 

11.7762 +.0887 
11.8466 +.0279 
12.4000 +.0477 
11.5000 
12.4000 +.1216 
a | | | | 
7.1192 +.0150 
11.8534 +.0262 
11.5210 +.0602 
11.3548 +.0339 
11.8200 +.0499 
69.2078 +.0918 
69.2895 +.1947 
70.6774 +.1354 
68.8810 +.2466 
69.1963 +.0982 
72.5000 +.9539 
70.5000 
69.5000 +.7909 
69.3667 4.2597 
9.4810 +.0609 
9.8026 +.0208 
10.1000 +.0954 
9.7000 
10.5500 +.0997 
9.7877 +.0203 
9.5526+.0516 
9.2452, +.0254 
9.8067 +.0322 

7.0333 +.0492 
7.1188 +.0159 
7.4000 +.0477 
6.9000 
7.5000 +.2861 
7.0790 +.0375 
6.9516+.0201 
7.1733 +.0301 
72.5822 +.0884 
74.0263 +.2494/57.4737 4.1748 
75.1459 +.1444/57.4194+.1035 









73.7857 +.3858 
72.4738 +.0891 
73.0000 +.2384 
71.5000 
71.5000 +.3372 
55.7857 4.2913 
57.2173 +.0810 
59.0000 +.2384 
59.5000 
59.0000 +.5058 

57.1393 +.0806 


73.1000 +.2147|57.4333 +.2441 
