AMASTRA, MOLOKAI. 251 



/. Ovate; last whorl covered with 



dark cuticle. A. pullata, no. 71. 



f 1 . Globose-conic; last whorl light 



above, dark below periphery; 



15x10 to 16x9.3 mm. 



A. seminuda, no. 72. 

 e 1 . Diam. half the length, more or less; 



narrower shells. 



/. Dense black cuticle on last whorl, 

 often streaked or zigzag on pen- 

 ult. ; 20x10 to 11 mm. 



A. uniplicata, no. 73. 



f 1 . Very little 'cuticle remaining; last 



whorl generally mall eat e ; 19x 



10.5 mm. A. borcherdingi, no. 74. 



d 3 . Length 28 to 38 mm. ; very little cuticle; 



fleshy, violaceous or gray. 



A. violacea, no. 69. 



c 1 . Cuticle decorated with zigzag or angular mark- 

 ings, sometimes wanting. 



d. Globose-conic, the diam. about % the 



length ; aperture more than half the 



length. A. sykesi, no. 76. 



d 1 . Ovate or oblong-conic, narrower; aperture 



half the length or less. 

 e. Ground-color yellow. A. citrea, no. 

 75b ; A. atroflava, no. 75c. 

 e 1 . Ground-color brown, fleshy or whit- 

 ish. A. borcherdingi, no. 74; A. 

 mucronata, no. 75; A. simularis, no. 

 75 ; A. nubifera, no. 77. 



Section CYCLAMASTRA Pils. & Van. (p. 147). 

 65. A. UMBILICATA (Pfeiffer). PL 36, figs. 6, 7. 



Shell very narrowly but openly umbilicate, dextral, ovate- 

 conic, thin, striate, opaque, brown ; spire a little concavely 

 conic, the apex acute. Whorls 6, but slightly convex, the last 

 a little shorter than the spire, angular at base. Aperture el- 



