58 Original Descriptions of Achatinella. 



the latter is black, whereas that of the former is brown, and that 

 of the intermediate forms varies from black to brown. 



Hab. Nuuanu Valley. — Bald. 



Dr. Cooke, in his paper on the Distribution and Variation of 

 A. multizonata from Nuuanu Valley, has divided this shell into 

 twenty-five color-varieties, using the letters A-T and V-Z. He 

 goes on to say that : 



"These color-varieties fall naturally into seven groups. The 

 first of these groups, and also the largest, is made up of the color- 

 varieties A-H. It is easily recognized, as none of the shells are 

 marked with dark bands or lines. The shells vary from white to 

 yellow. The apex is white to light brown ; never striped. The 

 columella is usually white, sometimes purple. This group repre- 

 sents about 37 per cent, of A. multizonata. Of this group 63 per 

 cent, were found on lehua, about 16 per cent, on Straussia, and 

 17 per cent, on guava. 



"The second of these groups contains the color-varieties I-M. 

 The shells are white to yellow, sometimes marked with brown. 

 All the shells of this group are encircled at the periphery by a dark 

 brown band, or two brown lines. The apex in every case is white 

 or light brown. The columella is usually purple, almost never 

 white. This group is only found from sub-ridges I-XIV. It con- 

 tains nearly 19 per cent, of the specimens of A. multizonata . Of 

 this group 53 per cent, were found upon lehua, 15 per cent, on 

 Straussia, and 24 per cent, on guava ; 48 per cent, of this group 

 were found on subridges IX-XIII. 



"The third of these groups contains the color-variety N. This 

 color-variety is so distinct from all the other color-varieties that it 

 is thought best to place it in a group by itself. All the specimens 

 came from sub-ridges III-V, 62 per cent, coming from sub-ridge 

 IV. About 40 per cent, were found on lehua, 21 per cent, on 

 Straussia, and 27 per cent, on guava. 



"The fourth group contains the color-varieties O-Q. This 

 group is distributed over nearly the whole range of the species. 

 It is absent, however, from sub-ridges IX-XI. The shells of this 

 group are striped with from four to fifteen lines or bands. The 

 apex is striped with a light brown band. The columella is usually 

 purple ; in only a very few cases is the columella white. Of this 

 group 48 per cent, came from sub-ridge XIV ; 44 per cent, were 

 found on lehua, 12 per cent, on Straussia, and 43 per cent on guava. 



"The fifth group is made up of color- varieties R-T. The 

 shell is white, variously striped ; the apex is white ; columella is 

 usually purple. About 60 per cent, were found on lehua, 15 per 

 cent, on Straussia, and 19 per cent, on guava. This group is dis- 



