280 AMASTRA, MAUI. 



&. Last whorl pale or creamy under a plain black- 

 ish cuticle, 

 c. Globose-conic, or acutely ovate, diam. more 



than half the length. 



d. Larger, length 19 to 23 mm., spire broadly 

 conic; W. Maui. 



A. baldwiniana, no. 91. 



d 1 . Smaller, length 15 to 17 mm., spire con- 

 cavely conic ; E. Maui. A. nigra, no. 92. 

 d 2 . Smaller, more solid; length 12.5 mm. 



A. subcrassilabris, no. 93. 



c 1 . Oblong-conic, diam. about half the length; 

 20x10 mm. A. makawaoensis, no. 94. 



6 1 . Glossy, with no dark outer cuticle; chestnut or 



chestnut and yellow, not malleated ; 18 to 20x10 

 mm. A. mastersi, no. 95. 



6 2 . Straw-colored or brownish, covered with a thin 



epidermis, the apex purple; 15x7.5 mm. 



A. erecta, no. 101. 



d 3 . Dark reddish-brown, with some dusky cuticle on 

 last whorl ; 11.3x6 mm. A. johnsoni, no. 100. 

 d*. Dark brown, plain or banded with white ; no dull 

 outer cuticle ; 11x6.3 mm. 



A. a. subpulla, no. 96d. 



ft 5 . Later whorls with mottled or zigzag-marked cu- 

 ticle. 



c. Last Whorl angular at periphery; 15 to 16.5x 



9.5 mm. A. conifera, no. 99. 



c 1 . Last whorl rounded. A. affinis, no. 96; mal- 



leata, no. 98 ; nana, no. 97 ; assimilis, no. 



102; montana, no. 103. 



Subgenus CYCLAMASTRA Pils. & Van. 



(Series of A. umbilicata; p. 149.) 



83. A. MORTICINA n. sp. PI. 36, figs. 8, 9. 



The shell is umbilicate, rather thin, with globose last 

 whorl. The spire is straightly conic, a little attenuated near 



