38 
VARIATION, DISTRIBUTION, AND EVOLUTION OF THE GENUS PARTULA. 
(table 12) are given in terms of the class values and not of the absolute measure- 
ments. The mean values and the standard deviations are the fundamental de- 
scriptive constants of the curves of variation of the several associations and of the 
more comprehensive groupings. The consecutive order is somewhat misleading, 
TABLE 12.—Partula radiolata, Guam. Statistical description: range of the fundamental characters. 









































Shell. Aperture. Length aper- 
: ture + length 
Series. No. shell, propor- 
Length. Width Proportions Length. Width. Proportions. tions. 
Northeast Region: mm. mm. dp. ct. mm. mm. p. ct. p. ct. 
Laraguesi; vscepmeba: 58 14.15 —18.65 9.1—11.5 56.5 —65.5 8.5 —10.5 6.3 —7.7 69.5 —77.5 52.5 —60.5 
East Central Region: 
Batrigardatsmcis ts 22 15.35 —19.25 9.5—11.9 58.5 —68.5 8.5 —10.7 6.3 —7.9 67.5 —76.5 54.5 —60.5 
Dededo.eakianea ss 144 14.45 —18.65 9.3 —11.3 57.5 —69.5 8.5 —10.5 6.3 —7.5 67.5 —79.5 52.5 —61.5 
WAUCIO dated nese aie 57 15.05 —18.35 9.1 —10.9 57.5 —65.5 8.3 —10.1 6.1—7.5 70.5 —77.5 51.5 —58.5 
Whole region!... .|228 14.45 —19.25 9.1—11.9 56.5 —69.5 8.3 —10.7 6.1—7.9 67.5 —79.5 51.5 —61.5 
Coast Central Region: 
Aniguaciit nesses 37 15.35 —18.05 9.5 —11.3 56.5 —66.5 8.9 —10.5 6.1 —7.5 67.5 —75.5 54.5 —60.5 
Presidio, outer...... 22 16.25 —18.35 10.3 —11.5 59.5 —69.5 9.1—10.1 6.7 —7.7 70.5 —76.5 53.5 —59.5 
Whole region!....| 78 15.35 —18.35 9.5 —11.5 56.5 —69.5 5.4—10.5 6.1—7.7 67.5 —76.5 53.5 —60.5 
South Central Region: 
Viigslowet-® a. 3 193 15.65 —18.95 9.3 —11.3 55.5 —64.5 8.5 —10.5 5.9 —7.3 65.5 —77.5 50.5 —59.5 
Wiig; Upperticie< ses 25 15.95 —18.65 9.9 —10.9 55.5 —65.5 8.9 —10.5 6.3 —7.3 68.5 —76.5 52.5 —57.5 
Pago River a aaa. ot 17 15.65 —18.65 9.3 —10.9 57.5 —62.5 8.7 —10.1 6.3 —7.3 68.5 —73.5 $2.5 —58.5 
Pago, Northinncs os 43 15.05 —18.65 9.3—11.1 57.5 —65.5 8.5 —10.3 5.9 —7.3 68.5 —77.5 50.5 —59.5 
Ronit: pe oth ca cree ale 24 15.65 —18.35 9.3 —10.5 56.5 —65.5 8.5— 9.9 5.9—7.1 67.5 —73.5 53.5 —60.5 
Ordotgcrs s civee ie on 43 15.05 —18.05 9.5—11.1 57.5 —64.5 8.5—10.1 6.3 —7.3 69.5 —76.5 51.5 —59.5 
Macainao.asd ttre 25 15.35 —17.15 9.5 —10.5 58.5 —65.5 8.7— 9.9 6.3 —6.9 68.5 —74.5 53.5 —60.5 
HOnte ys. wane aes 21 14.75 —17.45 8.7 —10.3 57.5 —62.5 8.5— 9.5 6.1—-6.9 67.5 —74.5 54.5 —59.5 
Whole region..... 391 14.75 —18.95 8.7 —11.3 55.5 —65.5 8.5 —10.5 5.9 —7.3 65.5 —77.5 50.5 —60.5 
Apra Region: 
Cabras, ea6t...... >» 105 14.15 —17.75 8.3 —10.7 55.5 —65.5 7.7—-9.7 5.5—7.1 69.5 —77.5 50.5 —58.5 
Cabras, west...... »| 69 13.85 —16.85 8.5 —10.7 57.5 —65.5 7.9 —9.3 5.7 —7.3 69.5 —81.5 $1.5 —59.5 
OTOte sneer mates 128 13.55 —17.45 8.5 —10.7 56.5 —68.5 7.7—9.5 5.3 —6.9 66.5 —76.5 50.5 —61.5 
Whole region..... 302 13.55 —17.75 8.3 —10.7 55.5 —68.5 7.7—9.7 5.3 —7.3 66.5 —81.5 50.5 —61.5 
West Central Region: 
Salifan. sesso ss ae 11 15.65 —18.35 9.9 —11.5 60.5 —66.5 8.9 —10.3 6.7 —7.5 71.5 —75.5 
Southwest Region: 
Umatac Salonga....| 53 15.35 —18.95 9.5 —11.7 56.5 —65.5 8.7 —10.7 6.3 —7.9 68.5 —76.5 52.5 —61.5 
Umatac Pajom..... 55 15.35 —18.95 9.5 —11.5 55.5 —65.5 8.7 —10.5 6.3 —7.9 67.5 —76.5 53.5 —60.5 
Umatac Madog..... 133 15.05 —20.45 9.3 —12.1 55.5 —67.5 8.3 —11.3 5.9 —7.9 66.5 —77.5 49.5 —61.5 
Mietizg ne oe Geman ie. 69 15.95 —18.65 9.5 —11.7 56.5 —67.5 8.5 —10.5 6.3 —7.5 67.5 —76.5 51.5 —60.5 
Whole region..... 310 15.05 —20.45 9.3—12.1 55.5 —67.5 8.3 —11.3 5.9—7.9 66.5 —77.5 49.5 —61.5 
Southeast Region: | 
Enarajan: eo oak 38 | 14.15 —17.45 8.5 —10.5 58.5 —65.5 8.3 —9.9 5.7—7.1 67.5 —77.5 53.5 —60.5 
Whole island..... 1416 13.55 —20.45 8.3 —12.1 55.5 -69.5 7.7 —-11.3 5.3 —7.9 65.5 —81.5 49.5 —61.5 


1 Including the smaz‘ler local collections. 
because the several localities are not arranged serially around the island like the 
areas of investigation in Tahiti; but it is impossible to devise a tabular order which 
will indicate how a given community is to be compared with a number of others 
situated in different directions with reference to it, as, for example, Macajna in 
relation to Fonte, Agafia, Ordot, and Lonfit. 
