24 PARTULINA, MOLOKAI. 



SPECIES OF MOLOKAI. 



Key to Achatinellinae of Molokai. 



NOTE. Yellow forms plain or with zigzag black stripes should 

 be looked for in Laminella, Vol. XXI, p. 345. 



A. Shell elongate, dull, with distinct or strong spiral sculpture, 

 the columellar fold weak or wanting. 



Newcombia, p. 1. 



A 1 . Shell very glossy and smooth, porcelain-like, coloration 

 light and in bands, never longitudinal stripes or flames; 

 columellar fold strong. 

 a. Shell dextral. 



b. Spire long; shell white, uniform or with gray or 



light brown streaks, generally having a subperi- 

 pheral dark band or several bands; length 16-19 

 mm. mighelsiana, no. 45. 



ft 1 . Spire shorter, concavely conic, the last whorl bulg- 

 ing; yellow, usually with a chocolate subsutural 

 line or band; length 13-18 mm. polita, no. 44. 

 6 2 . Spire straightly conic, last whorl not bulging, color 

 various. bella, no. 42. 



a 1 . Shell sinistral, obesely ovate-conic, yellow, the embry- 

 onic whorls w r hite with a dark band. 



subpolita, no. 43. 



A*. Shell ovate-conic or pyramidal, showing moderate sculpture 

 under a lens; last embryonic whorl usually variegated; 

 columellar fold well developed. 

 6. Embryonic whorls having a dark spiral band. 



virgulata, no. 8. 



6'. Embryonic whorls having vertical or protractive stripes, 

 or sometimes plain. 



c. Ovate-conic, rather large, length usually 23 to 



26 mm. 



d. Surface dull, fine spiral sculpture being well 

 developed; banded or streaked. 



rw/rt, no. 10; tessellata, no. 9. 

 d l . Surface glossy; striped or plain. 



proxima, no. 11. 



