AMASTRA, MAUI. 287 



86a. A. soror inter jecta n. var. PI. 48, figs. 9, 10, 11. 



Smaller than soror; more solid than subsoror. Spire 

 brown, slightly contracted above, the last whorl a lighter 

 shade of brown or pale buff, covered with a very thin brown 

 cuticle which seems to be more permanent than in soror. 

 Whorls of the spire less convex than in A. subsoror, usually 

 showing a delicate carina above the suture, but none is visible 

 on the embryonic whorls. Aperture white within, having a 

 rather thick callus lining. Columellar fold moderate. 



Fig. 10. Length 11, diam. 6, aperture 5 mm. ; 6*4 whorls 

 (no. 57827). 



Fig. 9. Length 11.5, diam. 6, aperture 5 mm. ; 6 l / 2 whorls 

 (no. 1566a). 



Length 11, diam. 6.3, aperture 4.9 mm.; 6 whorls. 



Lahaina : Cotypes no. 1566, Boston Soc. and 57827 A. N. 

 S. P. 



There is often a pale line at the periphery of the last 

 whorl. Dr. Newcomb sent out A. subsoror and interjecta as 

 soror, evidently thinking them a form of his species. Work- 

 ing with museum specimens, we are unable to properly test 

 the question of specific or racial distinction, which must be 

 left to naturalists who <can study the problem on the ground. 



86b. A. soror laticeps n. var. PI. 48, fig. 8. 



Similar to interjecta, except that the spire is wider, con- 

 tracts less above, the last whorl of the embryonic shell being 

 decidedly wider. Aperture whitish, somewhat thickened 

 within; columellar lamella receding, rather heavy and sub- 

 vertical within. Length 12.8, diam. 6.9, aperture 5.5 mm. ; 

 6 whorls. 



Maui : Type no. 10213, A. N. S. P., received from Dr. New- 

 comb with A. subsoror. 



87. A. SUBSOROR Hyatt & Pilsbry, n. sp. PI. 48, figs. 6, 7. 



The shell is sinistral, narrowly rimate, ovate-turrite, 

 thin, dull brown. Spire a little 'Contracted near the summit; 

 the embryonic whorls reddish-brown, convex, delicately stri- 

 ate, the strige arcuate, thin, narrower than their intervals. 



