ACHATINELLA BYRONII. 137 



Length 17.5, dia.ni. 10 mm. Waipio. 



Length 18.2, diam. 9.4, aperture 8.7 mm. Waiawa. 



Length 16.3, diam. 10, aperture 8.8 mm. Waiawa. 



In Dr. C. M. Cooke's collection there is a lot -of 9 specimens 

 (no. 1828-30) agreeing entirely with some of Gulick's Wai- 

 nialu rugosa (such as pi. 27, fig. 9a), said to have been col- 

 lected in " a very small and extremely isolated clump of trees 

 on the extreme S. slope of the Wai ana e range, ' in the region 

 of Palihua. As the collector was a person knowing noth- 

 ing of shells, I cannot help suspecting that he got a Koolau 

 range lot confused with lids Waianae catch. The shells are 

 greenish-black with the first neanic whorl green or olive 

 streaked on a yellow ground, embryonic whorls deep livid 

 purple in some, white in other examples. They have the 

 gummy gloss of rugosa. 



1. Sub variety capax Pils. & Cooke. PL 31, figs. 7, la, 11. 

 At the head of Waiawa gulch, along the Waiahoie- Waiawa, 

 ditch trail, 14 mile from top, Mr. Spalding collected large, 

 robust specimens, less wrinkled than the typical form. The 

 shell is streaked with olive 'and yellowish-olive on a lime-green 

 ground, often with chestnut 'bands at periphery and base. 

 The lip is either pure white or narrowly bordered with purple 

 or brown; embryonic whorls either flesh-pink or bicolored, a 

 brown zone above, white below. They were on banana and 

 ieie. The colony was found to extend as far as the Kipapa 

 division ridge, and probably goes farther north. There is but 

 little variation in color and shape, and it is invariably dextral. 

 The patterns are shown in figs. 1-71}. 



Length 21, diam. 12.5, aperture 11 mm. ; 6 whorls. 

 Length 19, diam. 10.5, aperture 9.2 mm. 



2. Subyariety ivaimanoensis P. C., new. PI. 31, figs. 9 to 

 9f7. On the crest of the Waimano-Manana ridge, a half mile 

 to a mile 'above the locality of A. t. cookei, 'there is a dextral 

 pulcherrima-like shell, with ground of almost white, buff, or 

 greenish yellow, plain or with chestnut bands in the typical 

 rugosa positions, or variously split into lines ; lip white or pale 

 lilac. Surface much smoother than in rugosa. Embryo 

 white, or in the darkest shells, light brown or bicolored. All 

 seen are dextral. 



