172 Original Descriptions of Achatinella. 



intus albida; columella superne paruni plicata, turn lamina parva traiisversim 

 munita; peristoma simplex, rectum. Alt. 11 3-4, diam. max. 6 1-2 mm. 



Shell dextral, elongate, subperforate, solid, substriate, cov- 

 ered with a blackish-brown epidermis, apex somewhat acute; 

 suture simple; whorls 7, quite flat, the last equal to more than 1-2 

 the length of the shell; aperture sinuately semioval, whitish within; 

 columella hardly plicate above, the fold, when present, is small, 

 transverse; lip simple, erect. 



Hab. lyanai. 



4. Shells from West Alain. 



312. Achatinella assimilis Newcomb. 



A. assimilis Pfr. P. Zool. Soc. London, 1853, p, 14S, pi. xxiii, fig. 53. 



Shell conically elongate, acute above ; whorls 7, rounded; 

 suture well impressed; aperture small, ovate; columella very short, 

 plicate, twisted; lip acute, slightly thickened within; color white 

 or salmon, sometimes the lower half of the last whorl white, and the 

 rest of salmon; within pure white. Long. 1 1/20, lat. 5 1/4/20 poll. 



This species might be mistaken for a dwarf variety of A. 

 mastersi. Its habits are quite different, its locality distant, and 

 the shell has an aspect quite distinct from the small varieties of 

 A. mastersi as found on West Maui. — Newc. 



Hab. West Maui. 



313. Achatinella carinata Gulick. 



Amastra carinata Gk. P. Zool. Soc. London, 1873, p. 83. 



This is the var. aggliitinans of the species obesa, Newc, Proc. 

 Zool. Soc. 1853, p. 143, pi. 23, fig. 39a, where it is thus described: 

 "Shell somewhat carinated on the last two whorls, with the keel 

 extended by agglutinations, giving it a pagoda-like form." 



Station. On the ground. — Gk. 



Affinities. It is allied to Am. obesa Newc, but that species, 

 which is confined to East Maui, is nearly globose with an evenly 

 rounded body whorl, while this is strongly carinated ; that also 

 has but little of the rough bark-like epidermis with which this is 

 loaded. — Gk. 



Hab. Wailuku.— Gk 



Mr. Baldwin places this with obesa Newc. 



