AMASTRA, MAUL 287 



86a. A. soror inter jecta n. var. PL 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 tlie 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, dram. 6, aperture 5 mm. ; 6^2 whorls 

 (no. 1566&). 



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



Lahaina : Cotypes no. 1566a, 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 inter jecta 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 inter jecta, 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 striae arcuate, thin, narrower than their intervals. 



