PARTULA SALIFANA. 
29 
character, namely, the proportionate relations of aperture and shell, that salifana 
resembles the other two forms; the likeness is close in the case of radiolata but less 
This last character, however, proves to be almost 
generically constant as the studies of the species from the Society Islands have 
proved. 
marked in the case of gibba. 
No. 
P. salifana..| 17 
Pi gibba., Fe. 86 
P. radiolata..| 11 
P. salifana as 
compared with 
Te eS00G Sat. o. 
P.  salifana as 
compared with 
P. radiolata.... 


TABLE 8.—Partula salifana, Guam, compared with P. gibba and P. radiolata of the same locality. 
Length. 
Shell. 
Width. 
Proportions. 
MEAN VALUE. 
Length. 
Aperture. 
Width. 
Length aper- 
ture + length 
shell, propor- 
Proportions. tions. 
mm. 
18.0500 +.1505 
17.3419 +.0433 
16.3045 +.1557 
+0.7081 +.1566 
+1.7455 +.2161 
mm. 
11.0059 +.0628 
12.0651 +.0338 
10.4091 +.0820 
—1,0592 +.0713 
+0.5968 +.1033 
p. ct. 
60.8528 +.3121 
69.6046 +.1293 
63.5000 +.3420 
—8.7518 4.3393 
—2.6472 +.4641 

mm. 
10.2294 +.0550 
9.9488 + .0286 
9.3000 +.0774 
+0.2806 +.0619 
+0.9294 +.0949 
mm. 
7.1500 +.0341 
7.3279 +.0222 





6.9182 +.0473 
—0.1779 +.0407 
+0.2318 +.0583 
74.1364 +.2779 
p: ch. 
56.6176 +.2305 
57.3372 +.1028 
57.0556 +.2586 
dD. ck. 
69.5588 +.2134 
73.5930 4.1287 

—4,0342 +.2492 |[ —0.7192 +.2524] 
—4.5776 +.3504 |[ —0.4380 +.3437] 


