298 AMASTRA, MAUI. 



carina often conspicuously projecting. The following whorls 

 of the cone (which is straightly conic above the penultimate 

 whorl) are unevenly striate, and the intermediate whorls are 

 usually more or less pitted, cicatricose, or irregularly mal- 

 leated, the impressions gray, fleshy or pink. The last whorl 

 is yellowish white, generally with small fragments of a brown 

 cuticle adhering on the last half. In some shells there remain 

 traces of angular dark lines of cuticle on the last whorl. The 

 aperture is white, with a narrow lip-rib or none. Columella 

 very narrow with a small oblique fold in the middle. 



Other specimens of the same lot from Kula have the em- 

 bryonic whorls more finely striate, and in one shell they are 

 convex and finely striate; so that this species varies much 

 as figured for A. nigra in characters of the embryo, while the 

 later stages seem alike. 



In some lots the carina of the neanic whorls is concealed 

 at the suture ; in others it may show above the suture on the 

 third whorl. 



A. rustica Gulick, according to paratypes from Kula, re- 

 ceived from Gulick (pi. 44, figs. 12 to 16), is not, I think, 

 specifically separable. On the last half-whorl it usually re- 

 tains much of the cuticle, which is dark olivaceous or brown- . 

 ish, streaked and mottled with lighter, or variegated with 

 dark zigzag streaks on a pale ground. The original descrip- 

 tion follows. 



"Amastra rustica Gk. Shell dextral, imperf orate, ovate- 

 conic, striated lightly with growth-lines, very pale reddish 

 under an olivaceous 'Cuticle. Whorls 6, a little 'convex, the 

 first two very strongly, the third lightly silicate. Suture 

 simple, not very deep. Aperture small, not as long as the 

 spire, somewhat reddish ; peristome arcuate, thin ; columella 

 short, provided with an inconspicuous fold, joined to the lip 

 by a very thin callus. Length 14!/2, diam. T 1 /^ mm. Kula, in 

 East Maui, on the ground. It is allied to Am. affinis Nwc., 

 but is readily distinguished by its convex spire " (Gulick). 



A. goniostoma has been accepted as a synonym of affinis by 

 Newcomb, Hartman and Sykes. The description follows. 



"Achatinella goniostoma Pfr. Shell rimate, dextral, tur- 



