

104 



TABLE 51.—Partula gibba, Saipan. 

ee | eee 








70.3763 +.0316 

Proportions. 
Pp. ct. 
64.5 —76.5 
65.5 —76.5 
67.5 —77.5 
63.5 —77.5 
64.5 —77.5 
62.5—80.5 
65.5 —77.5 
61.5 —76.5 

61.5 —80.5 
MEAN VALUE. 
69.4669 +.0895 
70.9466 +.0644 
71.9149 +.1093 
70.4736 +.0842 
70.6757 +.1301 
70.1232 +.0782 
71.6338 +.0957 
69.3726 +.0636 

8.5 —11.3 
10.0449 +.0166 
9.7074 +.0131 
10.0238 +.0214 
9.6727 +.0142 
9.5013 +.0227 
9.8266 +.0117 
9.8993 +.0116 
9.5308 +.0116 
9.7461 +.0057 
STANDARD DEVIATION. 
Shell. 
Series. No. 
Length. Width. 
mm, mm. 
Puntan Flores........ 272 15.65 —18.95 10.7 —13.9 
SadogsTase™ f. haan sae 403 15.05 —18.95 10.5 —13.7 
Puntan Muchut...... 146 15.05 —18.95 10.9 —13.5 
Fafiaganam®...4¢6...06. 416 14.45 —19.55 10.5 —13.3 
LOMO Ak ties ai ere 148 14.75 —18.35 10.3 —13.3 
Astaman yt... en e 406 15.35 —19.55 10.7 —13.9 
GArapalls.ce oss 5 seme 269 15.35 —19.85 10.5—13.7 
Chalanityaic dscres isl oe 14.15 —18.95 10.1 —13.3 
Whole collection... .|2586 14.15 —19.85 10.1 —13.9 
Pimtan Flores..o05. 5 272! 17.5978 +.0271| 12.2360+.0212 
Sadog. Paseg.y see a 403| 16.9855+.0230| 12.0697 +.0186 
Puntan Muchut...... 146) 17.2153+.0385| 12.3939+.0275 
Banaganams. ioe sae 416} 17.0327+.0292| 12.0156+.0182 
TOES cite ae aie 148} 16.6574+.0303| 11.8000 +.0308 
Astamana.. sss fees 406| 17.2882 +.0216| 12.1350+.0169 
Garapall cy bint ee 269) 17.1555 +.0266| 12.2993 +.0216 
Chalankivas «9.50 a 526| 16.7866+.0223| 11.6475 +.0143 
Whole collection... .|2586| 17.0765+.0102| 12.0296+.0076 
Puntan Flores........| 272} 0.6629+.0191/ 0.5184+.0150 
BAAOR. LASCi cb. oi kia 403 .6848 +.0162 .5530+.0131 
Puntan Muchut...... 146 -6897 +.0272 4935 +.0194 
Fanaganam..........- 416 .8831+.0206 .5504+.0128 
SLOSTE: Sines Satie nee 148 .7096 +.0278 -5563 +.0218 
ASAMaMN oie eters wie 406 6471 +.0153 .5062 +.0119 
(CSATAapAn Fi an eee ve 269 -6485 +.0188 9252 +.0153 
Chalankiyariaunsee «oh 526 -7575 +.0157 4877 +.0101 
Whole collection... .|2586 -7702 +.0072 .5726+.0054 


TABLE 52.—Partula gibba, Saipan. 


Locality. 

Puntan Flores... 
Sadog Tase..... 
Puntan Muchut. 

— .3853 +.0490 
+.6308 +.0448 
—.1327 +.0343 
(arapant «55.65 
— 3689 + .0347 
Chalankiva, 3... 

2.1619 +.0450 


Proportions. 
2.1884 +.0633 
1.9161 +.0455 
1.9582 +.0773 
2.5458 +.0595 
2.3472 +.0920 
2.3380 4.0553 
2.3274 +.0677 
2.3862 +.0223 


0.4059 +.0177 
-3918 +.0092 
-3841+.0151 
-4293 +.0100 
.4097 +.0160 
-3504 +.0083 
4049 +.0117 
.3947 +.0082 
4337 +.0040 



Statistical description. 
Aperture. 
Width. 
7.3919 +.0139 
7.1823 +.0113 
7.4606 +.0184 
7.2266 +.0105 
6.9784 +.0188 
7.3719 +.0095 
7.2784 +.0139 
6.9722 +.0089 
7.2125 +.0047 
0.3401 +.0098 
-3378 +.0080 
.3296 +.0130 
.3178 +.0075 
3390 +.0133 
-2841 +.0672 
-3383 +.0098 
-3027 +.0063 
-3583 4.0033 
Aperture. 
Length. 
Width. 

73.8735 +.0300 

2.2654 +.0212 

Proportions. 

VARIATION, DISTRIBUTION, AND EVOLUTION OF THE GENUS PARTULA. 





Length aper- 
ture + length 
shell, propor- 














Proportions. tions. 
p. ct. p. ct. 
67.5 —78.5 52.5 —61.5 
67.5 —79.5 53.5 —63.5 
66.5 —80.5 54.5 —63.5 
69.5 —80.5 50.5 —62.5 
69.5 —80.5 51.5 —63.5 
67.5 —81.5 51.5 —62.5 
67.5 —79.5 53.5 —63.5 
66.5 —79.5 52.5 —61.5 
66.5—81.5 50.5 —63.5 
73.5220 +.0909|56.9743 +.0644 
73.9417 +.0713)/57.0087 +.0509 
73.4932 +.1268/58.1165 +.0839 
74.5600 +.0722/56.7139 +.0703 
73.4054 +.1187/56.9189 +.1009 
74.9433 +.0746|56.7340 +.0584 
73.5400 +.0910/57.5558 +.0707 
73.0418 +.0616|56.2947 +.0478 



57.1991 +.0224 







1.5762 +.0455 
1.5148 +.0360 
1.5041 +.0593 
2.1266 +.0497 
1.8196 +.0713 
1.7467 +.0413 
1.7204 +.0450 
1.6267 +.0338 
2.2228 +.0643 
2.1212 +.0504 
2.2723 +.0896 
2.1831 +.0510 
2.1414 +.0839 
2.2284 +.0527 
2.2137 4.0643 
2.0956 +.0435 


1.6919 +.0158 

Progressive colonial comparison: mean values. 
Length aper- 
ture + length 
shell, propor- 
tions. 
Shell. 
Length. Width. 
mm. mm. 
\| —0.6123 +.0355 
+.2298 +.0448 
— .1826+.0483 
— 0.1663 +.0282 
+.3242 +.0332 
— .3783 +.0330 
—.2156+.0358 
+.3350+.0351 
+.1643 +.0274 
—.6518+.0259 
p. ct. 
+0.4797 +.1103 
+.9683 +.1268 
—1.4413 +.1380 
{[+.2021+.1550] 
—o25z.1518 
+1.5106+.1236 
—2.2012 1150 
mm. 
—0.3375 +.0211 
+.3164+.0251 
—.3511+.0257 
—.1714+.0268 
+-.3253 42,0255 
+.0727 +.0203 
— .3985 +.0202 
mm, 
—0.2096+.0179 
+.2783 +.0216 
—.2340+.0212 
—.2482+.0215 
+.3935 +.0211 
—.0935 +.0169 
— .3062 +.0165 

p. ct. 
+0.4197 4.1155 
— .4485 4.1455 
+1.0668 +.1459 
— 1.1546 +.1390 
+1.5379 +.1402 
—1.4024+.1177 
—.4991+.1099 
D.-C8 
[+0.0344 +.0821] 
+1.1078 +.9081 
— 1.3926 +.1095 
[+.2050 +.1230] 
[—1849+.1166] 
4.8218-£.0917 
— 1.2611 +.0853 
