ACHATINELLA, SECTION BULIMELLA. 121 



c 2 . Shell richly colored, banded. Lanihuli. 



A. f. wilderi, no. 116. 



II. Forms of the northwestern two-thirds of the main range. 

 a. Lip acute, but slightly or not thickened within ; shell sin- 

 istral, very smooth, richly colored. A. lila, no. 5. 

 a 1 . Lip distinctly thickened within. 

 6. Shell oblong-conic. 



c. Surface corrugated or somewhat roughened by 



growth- wrinkles. 



d. Interior drainage ; shell sinistral, later whorls 

 corrugated, intensely black or banded with 

 dark green. A. &. nigricans, no. 46. 



d 1 . Interior drainage; shell dextral. 



e. Roughly striate, streaked with green, chest- 

 nut or black, usually with sutural chest- 

 nut band or others; lip edged with 

 brown. A. byronii, no. 4. 



e 1 . More corrugated, occasionally black; sur- 

 face with a gummy gloss ; whole lip usu- 

 ally brownish ; length 16-19 mm. 



A. 6. rugosa, no. 4&. 



e 2 . Larger, broader, green-streaked; lip white 



or narrowly dark-edged; length 19-21 



mm. Var. capax. 



e s . Nearly smooth, whitish to greenish-yellow, 



plain or banded, lip white or pale lilac ; 



length 15-18 mm. Var. waimanoensis. 



d 2 . Northern (Koolauloa) slope; shell sinistral or 



dextral, the lip mainly white. 



A. decipiens, no. 7. 

 c 1 . Surface smooth ; shell dextral. 



d. Northern slope ; lip white. Various varieties of 



A. decipiens, no. 7, la. 

 d 1 . Interior slope. 



e. Lip bordered with blackish brown. 



A. pulclierrima, no. 6. 

 e 1 . Lip white throughout. A. p. nympha, no. 6a. 



