PARTULA OTAHEITANA. 281 
TaBLe 235.—Partula otaheitana crassa, northern series. Atehi, Maruapoo and Punaruu Valleys. 
Fecundity. 
No. of | Per cent] No. of | No. of Total Average Average 
COL gravid.| gravid. . | young. | contents. | for gravid.| for all. 
Atehi, plain, 1907 : F 25 
banded, 1907 : j 44 
Atehi, all, 1907 : ; .38 
Maruapoo, plain, 1908 ; : .09 
banded, 1908 ; BOM .87 
Maruapoo, all, 1908 : 1%; .07 
Punaruu, plain, 1906 : : .85 
banded, 1906 6 .00 
plain, 1908 , ‘ .97 
banded, 1908 g : .60 
plain, 1909 F j .99 
banded, 1909 : : .10 
85 
.99 
-00 
TaBLeE 236.—Partula otaheitana crassa, northern series. 
Herepity, PUNARUU VALLEY. 
Young, plain. Young, banded. Total. 
1906. | 1908. | 1909. | Total. | 1906. | 1908. | 1909. | Total. | 1906. | 1908. | 1909. | Total. 
Young, Young, 
Young, Young, 
plain. banded. plain. banded. 
Total. Total. 
In the case of the Atehi series, it is possible to conduct an inquiry into the 
Mendelian nature and behavior of the plain and banded color-characters. The 
unbanded adults amount to 31.5 per cent and the contrasted snails to 68.5 per cent 
of the whole population. When the gravid parents with distinguishable young are 
classified, they group themselves as follows: 
Plain adults: plain young, 9; both kinds, 4; banded young, 4........... 17 
Banded adults: plain young, 8; both kinds, 6; banded young, 51........ 65 
