ACHATINELLA STEWARTII. 205 



lightly marked with lines of growth and very faint spiral 

 striae ; variously colored, but the typical pattern is citron yel- 

 low fading to white at the summit, with a black or deep 

 brown band bordering the suture below on the last 3 to 3% 

 whorls, and a black crescent bounding the columella ; aperture 

 white, the columellar some shade of violet. Whorls about 

 6y 2 , convex, the last rather short. Outer lip simple or thick- 

 ened within; columellar fold strong. 



Length 22, diam. 11.3, aperture 10 mm., Manoa-Palolo ridge. 



Length 24.2, diam. 12.8, aperture 11 mm., Manoa-Palolo 

 ridge. 



Length 23, diam. 11.3, aperture 9.5 mm., Manoa-Palolo 

 ridge. 



Length 22, diam. 13, aperture 11 mm., Manoa-Palolo ridge. 



Oahu : Northwestern Palolo to Makiki and eastern Pauoa. 



Achatina stewartii GREEN, Contributions of the Maclurian 

 Lyceum to the Arts and Sciences, i, no. 2, p. 47, pi. 4, f. 1-4, 

 July, 1827. Achatinella stewartii Green, REEVE, Conch. Icon, 

 vi, pi. 4, f. 26. GULICK, Evolution, Racial and Habitudinal, 

 p. 41, pi. 2, f. 18 (Manoa). Achatinella fuscozona GULICK, 

 t. c., p. 41, pi. 2, f. 19 (Manoa). Achatinella pulcherrima 

 REEVE, C. Icon. pi. 3, f. 23a, b. Achatinella venulata var. a., 

 NEWCOMB, P. Z. S. 1853, p. 146, pi. 23, f. 48. Achatinella 

 byronii Gray, GULICK, Ann. Lye. Nat. Hist, of N. Y., vi, 1858, 

 p. 244. Achatinella johnsoni NEWCOMB, P. Z. S. 1853, p. 147, 

 pi. 23, fig. 50. GULICK, Evolution, etc., p. 41, pi. 2, f. 17 

 (Manoa). Achatinella aplustre NEWCOMB, P. Z. S. 1853, p. 

 147, pi. 23, f. 51. 



Professor Green's description of A. stewartii included also 

 the forms described later as producta, castanea, and johnsoni. 

 His shells were probably from Makiki and the slope of Mt. 

 Tantalus, and perhaps also from eastern Manoa, as the clear- 

 yellow ground of part of his figures is much like Manoa- 

 Palolo ridge shells. Later authors have restricted stewartii 

 to the yellow or green form with black sutural band such as 

 pi. 38, fig. 1, agreeing exactly with Green's fig. 2, which may 

 be selected as his type. PI. 38, figs. 2 to 3 are sinistral forms 

 of similar pattern. 



