NEWCOMBIA. 



Key to Species of Newcombia. 



a. Parietal wall making an angle with the columella, the latter 



having a low fold or twist. 



l>. Surface smooth to the eye, finely striate spirally under 

 a lens. Molokai. N. perkinsi, no. 6. 



N. philippiana, no. 5. 

 /A Surface spirally ribbed or coarsely striate, sinistral. 



Molokai. 

 c. Pale, the later whorls cream-colored; length 15 to 



25 mm. 



d. Spirals acute. N. plicata, no. 1. 



d *. Spirals rounded or subobsolete. 



N. p. gemma j no. la. 

 c 1 . Dark colored; length 12 to 18 mm. 



d. Spirals acute. X. camilicu'lata, no. 2. 



d 1 . Spirals obtuse, base darker. N. sukata, no. 3. 

 //'. Surface with fine beaded spirals, a small carina at peri- 

 phery; zigzag-striped, dark-colored, dextral. Maui. 



N. carmeHa, no. 4. 

 c/ 1 . Parietal wall continuous with the columella, which is not in 



the least folded. Sinistral. 



b. Longitudinal folds coarse and strong, rude spirals run- 

 ning over them. Molokai. .Y. ifciffrri. no. 9. 

 /A Longitudinal folds weak or wanting. 



r. Very weak folds crossed by spiral threads, the inter- 

 vals of which are minutely wave-striolate spirally. 



N. cinninyi, no. 7. 



c 1 . Smoother; spiral threads weak or effaced, the minute 

 wavy striolation well developed. Molokai. 



N. cinnamomea, no. 8. 



c 2 . Wrinkled or puckered over spiral cords; no minute 

 striolation. Molokai. JV. c. ualapuensis, no. Sn. 



Series of N. pi Ira (a. 

 1. N. PLICATA ('Mighels' Pfr.). PL 1, figs. 1, 2, 3, 6. 



Shell sinistral, turrited, rather thin; sculptured with acute, 

 elevated, spiral liree and very fine longitudinal lines; brown- 



