68 Director's Annual Report. 



varies greatly not only in color but also, in a less degree, in size 

 and form. Mr. Baldwin states in a note that "a great variety of 

 transition forms occur between this species and A. bcllula vSmith, 

 which is found on the neighboring mountain ridges of Nuuanu 

 valley, and is a much larger shell. ' ' A . hellula is not onh- larger, but 

 the shell is more solid and the median whorls less convex. A . bellida 

 varies to a much less extent. A. uiultizonata 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, disse<5led 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 containing a striped 

 3-oung, while only four cases have been found of shells with a 

 striped apex containing white young. 



For convenience the writer has divided this shell into twenty- 

 five color-varieties. Each of these color-varieties is designated by 

 a letter. The letters thus used are A-T and V-Z. A verv large 

 number of intermediate specimens occur. Some of these color- 

 varieties have a very restricfted range, being found on only three or 

 four of the sub-ridges ; others are found over nearly the whole 

 range of the species. 



Color-variety A. 



vSliell white, sometimes light yellow near the edge of the peris- 

 tome ; columella white, sometimes purple; 1 17 specimens. This 

 color-variety is distributed over nearly the whole range of the 

 species. It is not found in localities XlVa and XI\"b. About 

 70 per cent, of this color-variety were found on lehua, though this 

 tree represents only about 53 per cent, of the plants on which shells 

 were found. About 43 percent, came from sub-ridges \\\, \TII 

 and X. 



Color-variety B. 



Shell white, with the suture marked with a brown band or 

 line ; columella white-purple ; in the latter case the und)ilical re- 



