184 ACHATINELLA PELEOZONA. 



and ravines from Manana valley to the eastern end of the 

 Main Range. No other group of Achatinellastrum is found 

 east of Manoa valley, but westward the casta group appears 

 in the area inhabited by vulpina forms. 



The distribution is diagrammatically indicated in the ac- 

 companying map, p. 183. The stations of the respective 

 species are included between the looped lines and the main 

 axis of the range, but in reality the colonies actually occupy 

 only a small fraction of the areas indicated. 



14. A. PEUEOZONA Gulick. PL 24, figs. 10 to 13 ; pi. 36, figs. 

 10, 10a ; pi. 43, figs. 1 to Id. 



"Shell sinistral, scarcely perforate, oblong-ovate, solid, 

 shining, striated; white with from one to six black or chest- 

 nut bands varying in width; apex subacute; spire convexly 

 conical; suture marginate, moderately impressed; whorls 7, 

 moderately convex; columellar fold central, white, strong; 

 aperture a little oblique, lunately rounded ; peristome acute, 

 well thickened within, with columellar margin dilated, adnate, 

 or sometimes slightly detached; parietal margin wanting. 

 Length 22, diam. 12% mm. ; length of body whorl lGi/4 mm. ; 

 length of aperture 11 mm. ; an average sized specimen. 

 Length of a large specimen 25.4 mm. Average weight 10.5 

 grains.' (Gulick.) 



Mr. Gulick enumerates the following color-variants. ' ' Var. 

 a. With one broad band encircling the base. Var. &. With 

 two dark bands, one entering the aperture, the other revolv- 

 ing above the suture. This and var. a are sometimes found 

 in Kailua, Oahu. Var. c. White, with 3 or 4 bands at the 

 base. Var. d. Without bands, but more or less streaked 

 with fawn brown. Var. e. Dark brown, with two white 

 bands, one sutural, the other on the periphery of the body- 

 whorl. Var. f. Brown, with one or more black bands. Var. 

 g. Ash or olive brown, with one or more light bands. Var. 

 h. Chestnut or olive brown, with fine, black, spiral lines. ' 



Oahu: Keawaawa, on kukui and ki (Gulick, Spalding). 

 Formerly on the northern side of the range in Waimanalo, 

 Kailua and Olomana (Gulick) ; fossil in a coconut plantation 



