344 ACHATINELLA MUSTELINA. 



suture lightly margined, subcrenulate ; whorls 6, a little con- 

 vex, the last a little shorter than the spire, rotund at base. 

 Aperture oblique, broadly obauriform ; columellar fold above, 

 oblique, moderate ; peristome sublabiate, the right margin 

 narrowly expanded, columellar margin thick, flexuous, adnate. 

 Length 20, diam. 10% mm. ; aperture 9% mm. long, 5 wide. 

 Inhabits Sandwich Islands, Frick" (Pfr.). 



This is merely a multilineate form of the grayish mustelina, 

 similar to multilineata Newc., but based upon a shorter form 

 than that. 



Achatinella vestita. Shell sinistral, acuminate-conical; 

 light brown or white, with beautiful narrow dark brown 

 bands, more or less numerous ; imperf orate ; whorls 6, convex ; 

 aperture semilunate; lip reflected. Average length 1 inch, 

 diameter % inch. Hob. Waianai and Hawaii (Mighels, Proc. 

 Boston Soc. of Nat. Hist., ii, 1845, p. 20). 



If really from Waianae this would, we suppose, be multi- 

 lineata Newc. Several of Mighels' localities are certainly 

 false, and as the type of vestita was destroyed by fire, we can 

 only drop the species as impossible to identify positively. We 

 are the more willing to do this because vestita has page-prior- 

 ity over mustelina, and we feel unwilling to give up a name 

 which has been identified with certainty for one to which some 

 doubt attaches. 



Mokuleia. The typical form of mustelina is that found in 

 Mokuleia district, in the northwestern flank of the Kaala mass. 

 The typical color, pi. 63, fig. 5, is a deep shade of carob-brown 

 or blackish chestnut brown, the embryonic whorls white, pale 

 brownish towards the apex, or entirely cartridge buff. The 

 dark color begins on the fourth or fifth whorl. The lip is 

 thickened within as usual, and is either vinaceous buff or 

 nearly white. Shell either dextral or sinistral. The size as- 

 signed by Mighels, "1 inch," was probably approximate, as 

 the largest Mokuleia specimen I have seen is a little over eigh- 

 teen-twentieths of an inch. A more usual size is length 21, 

 diam. 12 mm. 



We do not know that the dark typical color-form occurs in 

 pure colonies. It is associated with shells of a citrine drab 



