Descriptions of New Species of Achatinella. 205 



Remarks. — This shell differs from the A. splendida Newc, 

 in its smaller size and pyramidal form, with spire less convex, 

 body whorl less ventricose, aperture smaller and less oblique, 

 lip less expanded and reflected. It also differs in being with- 

 out perforation, and is very rarely sinistral. 



The A. perdix Reeve, differs from this in its broader and 

 more ventricose form, its more convex spire, with whorls more 

 swollen, with aperture broader, and frequently subangulated ; 

 the arrangement of colors is also different. Looking only at 

 the type of this species, it would be placed in the same group 

 with A. splendida, yet it is so closely connected by inter- 

 mediate varieties with A. perdix, that it has hitherto been con- 

 sidered a variety of that species. 



Var. I). — 'With black basal band. A small specimen has 

 the following dimensions : 



Length 0.80 inch ; breadth 0.43 inch ; length of aperture, 

 0.35 inch ; weight 4.00 grs. 



Var. c. — Without band. I have a small specimen of the 

 brown variety of A. splendida Newc, which closely resembles 

 this. 



Var. d. — With apex chestnut-brown, not tessellated : — very 

 rare. 



Var. e. — With irregular white spots. This variety passes 

 into A. perdix. 



Station. — On trees. 



Habitat. — Lahaina, Maui. S. T. Alex. ! 



33. Achatinella imdosa. 



Plate VII. Fig. S3. 



T. dextrorsa, profunde anguste umbilicata, vel perforata, acunrinato- 

 ovato-conica, solida, uitida, striatula, sub lente obsoletissinie decussatula, 



