Green's new species of Achatina. 49 



instrument. The beautiful and shining colours of this Acha- 

 tina, and the manner of their arrangement, forcibly remind 

 us of the Helix nemoralis or hortensis, so common in the 

 woods and hedges throughout France and England. 



There are two very distinct varieties of A. Stewartii — 

 one dextral, or with whorls revolving from right to left. 

 In the numerous specimens which I have received, there is 

 no individual of single uniform colour — they are all green- 

 ish, with a single brown band at the sutures. The collu- 

 mella in this, as in the first variety, has the remarkable thick 

 plait or callosity resembling the Tornatella fasciata. — 

 The other variety is more globose and much depressed, be- 

 ing three fourths of an inch in length, and half an inch in 

 diameter; this shell is almost always dextral, and of a light 

 yellowish colour — and the callous ridge along the inner 

 margin is peculiarly striking. The contour of this variety 

 resembles that of the V olut a fasciata, Linn, the lip of that 

 species however is reflected. 



ACHATINA Oahuensis. 



%fl testa oblonga — tenuissime striata — colore feruginto 

 rufescente — collumella rosea — apertura alba et rosea — 

 labro tenvi. — Plate 4, fig. 5. 



Oahu Achatina. — Shell dextral — oblong — about three 

 fourths of an inch in length, and one fourth of an inch in 

 diameter — whorls seven or eight, slightly rounded — sutttres 

 deeply impressed and crenulated — periostracha finely stri- 

 ated and of a light dirty reddish brown colour — body whorl 

 with an obsolete carina — apex chesnut colour — collumella 

 plaited, as in A. Steivartii — outer lip thin — inside pinkish, 

 darker near the edge. 



