42 LEPTACHATINA, GROUP G. 



lection of the Philadelphia Academy has from 5 to 6 whorls. 

 I know of no species of Leptachatina, when adult, with as few 

 as 4% whorls. Adult specimens usually have from 5% to 

 6% whorls. 



This species is very variable in thickness and color. Some 

 of the specimens are dark brown with intergrades to light 

 greenish corneous. It also varies from ovate to ovate tur- 

 rited in form. 



53<z. L. c. dissimilis n. var. PI. 6, fig. 8. 



The shell is imperforate, broadly ovate, corneous, diaph- 

 anous, minutely and closely striate or costulate. Suture sub- 

 impressed, narrowly margined. Whorls 6^2? nearly flat, the 

 last very large. Aperture elongately ovate, narrow, slightly 

 oblique, perpendicular. Columella truncate, with a rather 

 strong fold. Lip slightly thickened. Length 7.6, diam. 4.1, 

 length of ap. 4.0 mm. 



Molokai: near Waikolu (Cooke). 



This variety is smaller, more distinctly striate and thinner 

 than the typical form of the species. 



54. L. NITIDA (Newcomb). PI. 2, figs. 20, 21. 



" Shell dextral, ovately conical, thin, pellucid, shining, light 

 corneous, with a faint linear band of red beneath the suture ; 

 whorls 6, ventricose; suture margined; aperture ovate; colu- 

 mella terminating in a twisted oblique white plait, lip thin. 

 Length 0.4, diam. 0.11 inch." (10.0x2.7 mm.) (Newc.) 



East Maui (Newc.) : Kula and Ulapalakua (Baldwin). 

 ?0ahu: Ml Kaala (Perkins). 1 Molokai (Borcherding). 



Achatinella nitida NEWCOMB, Ann. Lye. New York, vi, 1853, 

 p. 29; Proc. Zool. Soc. London, 1853 (1854), p. 140, pi. 23, 

 fig. 30. Achatinella (Leptachatina) nitida PFR., Mon. Hel. 

 Yiv., iv, p. 566. Leptachatina nitida PEASE, P. Z. S., 1869, 

 p. 651. SYKES, Fauna Haw., ii, 1900, p. 366. ? BORCHERD- 

 ING, Zoologiea, 48 n , p. 127, pi. 9, fig. 9-9a. 



In the original description the diameter is given as 0.11 

 inch (2.7 mm.) this is only about half the actual diameter. 

 In the description (Proc. Zool. Soc. 1853, p. 140) this was 



