ACHATINELLA BELLULA. 233 



have a little flowing water. The valley between sub-ridges 

 XIV and XV serves as a boundary to several of the color- 

 varieties. That between XVII and XVIII serves as a boun- 

 dary to the whole species. None of the localities are more 

 than 150 yards in diameter. A. multizonata is found in more 

 or less open localities. Specimens are seldom found where 

 there is a dense vegetation, the limit being at the thick growths 

 of the 'stag-horn fern' (Gleichenia dichotoma} and ieie (Frey- 

 cinetia arnotti). The elevation at which it is found is from 

 about 1000 ft. to about 1400 ft. Of the shells found, 95.5 per 

 cent, were on either lehua, Straussia or guava. Lehua repre- 

 sents 53.3 per cent, of the trees on which shells were found, 

 Straussia 9.8 per cent., and guava 29.8 per cent. Of A. multi- 

 zonata 54.6 per cent, were found on lehua, 14.2 per cent, on 

 straussia, and 26.7 per cent, guava. Of the remaining plants 

 P&deria fcetida, representing 1.7 per cent, [of the trees on 

 which shells were found] yielded 1.2 per cent, of the shells; 

 Kadua, representing 2.3 per cent., yielded 1.2 per cent. ; and 

 all others, about a half a dozen genera, representing 3.1 per 

 cent., yielded 2.1 per cent. 



"In all the specimens collected by the writer the mantle 

 varies from a very dark to a light slate color. It is sometimes 

 mottled with light or dark markings. A. bellula is not only 

 larger [than multizonata] but the shell is more solid and the 

 median whorls less convex. A. bellula varies to a much less 

 extent. A. multizonata varies from a pure white to a rich 

 mahogany brown, and also through a larger number of striped 

 variations. The apex of the shell also varies. In about half 

 of the color-varieties the apex is white or a very light brown ; 

 the rest have the apex striped with a light to a very dark 

 brown band. The color of the apex is nearly constant in each 

 color-variety. In color-variety W, however, slightly more 

 than half the shells have the apex white, the remaining having 

 a banded apex. 



" Young, dissected from the uterus of the animal, usually 

 agree in coloration, with the apex of their parent. Several 

 exceptions have been found of shells with a white apex con- 

 taining a striped young, while only four cases have been found 

 of shells with a striped apex containing white young. 



