AMASTRA, MAUI. 295 



fers from that species, as now restricted, by its oblong shape, 

 the penultimate whorl bulging more, and the last whorl less 

 convex, more or less contracted; by being covered with a 

 blackish cuticle, and by the usual (though not invariable) 

 spiral striation, or spirally descending malleated facets. It 

 is also less glossy. 



The penultimate and last whorls are sometimes uniform 

 black, except where the cuticle is lost in front of the aperture 

 and above the last half-turn of the suture. Usually the 

 penultimate whorl and front of the last are more or less 

 streaked. They are never marked with angulated streaks, 

 though at times there is some light niaculation or mottling 

 on some of the dark streaks. 



A form somewhat similar to this has been figured by Bor- 

 cherding from Molokai (Zoologica, Heft. 48, p. 116, pi. 10, 

 fig. 16). It is herein described as A. borcherdingi, as I be- 

 lieve it to be quite distinct from mastersi and makawaoensis. 



95. A. MASTERS: (Newcomb). PL 43, figs. 12-17. 



" Shell dextral, thin; whorls 7, rounded, slightly rugose 

 above, the last strongly inflated; apex acute; suture well im- 

 pressed; aperture ovate; lip simple; columella short, with a 

 thin lamellar plait ; color of shell white or rich chestnut, 

 with traces of a thin brown epidermis ; within white or bluish- 

 white. 



" The size varies much in this species, and the coloring is 

 also various, running from pure white through various tints 

 to a light mahogany. The lower part of the shell is not in- 

 frequently white, and the upper portion bright chestnut or 

 rose-colored. 



" Length sixteen-twentieths, width eight-twentieths inch 

 [==20x10 mm.]. Mani." (Newc.) 



1 ' Animal longer than the shell, of a fine flesh-color, covered 

 with granulations tipped with carmine ; tentacles and anterior 

 superior portion of the body dark-brown or black. Motions 

 fearless and active. An inhabitant of bushes (the ' Olona ') ' 

 (Newc.}. 



East Maui: Makawao (Baldwin, Thwing). 



