ACHATINELLA FUSCOBASIS. 171 



Thaanum collections) , fig. 2, are pure white, tout there are a 

 few of the patterns of figs. 1 and 3. 



Mr. Smith's figured type-specimen, no. 110 Gulick coll., 

 Boston Soc. N. H., measures length 15.2, diam. 9.3 mm. It 

 is shown in pi. 35, fig. 1. Other shells measure: 



Length 16, diam. 9.2 mm.; 16x9.5 mm. (near top of Mt. 

 Olympus; pi. 35, figs. 3, 4). 



Length 17, diam. 10.5 mm. ; 17.5 x 10 mm. ; 16.2 x 9 mm. 

 (Kuliouou). 



The figured type of A. luteostoma, no. 65704 A. N. S. P., 

 measures 16 x 9.7 mm., and one of Baldwin's examples 14.6 x 

 9 mm. 



The several color-forms occur in the same colonies. I do 

 not know that any of them has been found as a pure race. 



A. luteostoma Baldwin was based upon the white form of 

 fuscobasis, but Baldwin also included the banded shells in his 

 original account, which follows. " Shell sinistral, imper- 

 f orate, solid, ovate, spire eonvexly conical, apex obtuse; sur- 

 face shining, marked with fine growth-lines, under a strong 

 lens seen to be decussated by close, extremely minute spiral 

 striae, apical whorls smooth. Color white, with a reddish- 

 yellow lip. Whorls 51/2, margined above, slightly convex. 

 Suture moderately impressed. Aperture oblique, sinuately 

 oval, white within. Lip obtuse, thickened within, columellar 

 margin very slightly reflexed, extremities united by a very 

 thin yellowish callus. Columella reddish-yellow, terminating 

 in a strong tortuous fold. Length 15%, diam. 9% mm. 



" In occasional examples the basal portion below the 

 periphery is light-brown, and sometimes a bright chestnut 

 spiral band encircles the periphery " (Baldwin). 



The types of both fuscobasis and luteostoma were probably 

 from somewhere in the head of Pa-Mo valley. The locality 

 " Mt. Kaala " given in the original description of fuscobasis 

 was undoubtedly an error, as no such shell has been found in 

 the Waianae range. A native boy probably brought the 

 species to Gulick, who did not himself collect high in the 

 mountains. The two original specimens of fuscobasis and the 

 figured types of luteostoma are now before me. 



