Afha/iiiel/a Multizonata . 69 



gion dark brown or black ; 20 specimens. In this color-variety it 

 is interesting to note that the specimens were colle(5led only at the 

 extreme limits of the range of the species ; 4 specimens were found 

 on sub-ridges I-IV, and 16 specimens from sub-ridges XV-XVII. 



Color-variety C. 



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

 tome, apex light brown, this brown sometimes extends to the sec- 

 ond and third whorls; columella white, sometimes purple; 125 

 specimens. This color- variety is distributed over nearly the whole 

 range of the species, about 20 per cent, coming from sub-ridge X. 

 This color-variety is absent from sub-ridges I and II, and also 

 from localities XlVa and XlVb. 



Color-variety D. 



Shell a light chocolate brown ; columella white to purple ; 23 

 specimens. About 83 per cent, come from sub-ridges III-V, and 

 56 per cent, were found on straussia. This plant represents only 

 14 per cent, of the plants on which shells were found. 



Color-variety E. 



Apex and upper whorls white, the two lower whorls yellow; 

 columella white to purple ; 49 specimens. This color-variety is. 

 fairly distributed in small numbers over most of the range of the 

 species. 



Color-variety F. 



Apex white to light brown, spire white encircled with bands 

 or lines of light yellow which continue on the upper portion of the 

 lowest whorl, base yellow; columella white to purple. In two 

 specimens the suture is marked with a brown band. These two 

 .shells had the umbilical region dark brown, with the columella 

 and peristome purple; 102 specimens. This color-variet}- is dis- 

 tributed over nearly the whole range of the species. 



Color-variety G. 



Apex and spire white, base yellow ; columella white to purple; 

 192 specimens. This abundant color-variety is distributed over 



