210 ACHATINELLA STEWARTII. 



Part of the patterns of producta are nearly or quite iden- 

 tical with stewartii patterns, and would seem to belong to an 

 older period than that of the differentiation of producta. 



The original descriptions of the several forms referred to 

 A. stewartii and A. s. producta here follow. 



"Achatina stewartii Green. Shell heterostrophe, conical, 

 oblong, about one inch in length and half an inch in diameter ; 

 whorls 6 or 7, rounded and marked with numerous oblique and 

 delicate strias; apex rather obtuse and not eroded; a deeply 

 impressed line along the upper part of the whorls parallel to 

 the suture. Periostraca smooth and very glossy. Color and 

 marking exceedingly various; the ground color is usually 

 greenish or some shade of yellow ; sometimes a single blackish 

 colored band accompanied the suture ; sometimes this band is 

 double and of different shades, and on many specimens there 

 are two bands, one at the suture, and one in the middle of 

 the whorls. In some varieties the base of the body-whorl is 

 dark brown, the rest of the shell being of a dark fawn, and 

 not infrequently the whole shell is without any markings what- 

 ever, in which case the color is yellow. The aperture when 

 inverted is ear-shaped; the truncation of the columella is 

 rounded and thickened in a remarkable manner at its edge; 

 along the inner margin of the outer lip there is a strong 

 callous ridge, as in most of the species of this genus, which 

 gradually attenuates towards the edge of the lip, which is thin 

 and sharp inside, white and pinkish around the columella." 

 (Green). 



Oahu, on under side of leaves of the ti plant (Rev. C. S. 

 Stewart). 



Achatinella dunkeri Cuming, Pfr. "Shell imperforate, 

 oblong-turrited, rather solid, smooth; pale flesh colored, or- 

 namented with close brownish streaks, and frequently en- 

 circled by one or two black lines. Spire turrited, the apex 

 rather acute, white; suture lightly margined, pale. Whorls 

 61 /2> slightly convex, the last almost two-fifths of the length. 

 Aperture oblique, truncate-auriform; columellar fold white, 

 strong, tooth-like, subsulcate ; peristome unexpanded, acute, 

 white-lipped behind the brownish edge. Length 24, diam. 11 

 mm. ; aperture 10 mm. long, 5 wide. Sandwich Is., Dr. New- 

 comb (Pfr.). 



1 1 Achatinella bilineata. Shell oblong-conical, dextral, rather 

 ventricose towards the base, whorls rounded, columella den- 

 tately plicate; bright yellow, conspicuously encircled round 



