GASTEROPODA. 87 
ACHATINELLA ELLIPSOIDEA (Gould). 
Testa solida, ellipsoidea, levis, epidermide luteo interdum fusco zonato 
induta: spira anfractibus sex convextusculis ; sutura impressa : aper- 
tura parva, angusta; peristomate acuto, nigro ; plica columellari fere 
transversa, tent. 
Achatinella ellipsoidea, Goutp ; Proceed. Boston Soc. Nat. Hist., i. 
200. March 1847. Expedition Shells, 35. 
SHELL solid, ellipsoidal, smooth, covered with a thin ochreous and 
fawn-coloured epidermis, the colours arranged somewhat in zones. 
Spire ovate-conical; whorls six, slightly convex, not shouldered ; 
suture well marked. Aperture very small and narrow, lip simple, 
not thickened, edged black; columellar fold delicate, oblique, nearly 
transverse, without callus. 
Length of axis seven-twentieths of an inch; breadth seven-tenths 
of an inch. 
Inhabits Maui, Sandwich Islands. Brackenridge ; Hale. 
Closely allied to A. ventulus, FER., but is more slender, more smooth, 
tapering anteriorly, the last whorl sometimes closing towards the axis 
as it approaches the aperture, so as to appear distorted, and produce a 
very small aperture. A. tristis has a similar epidermis, and a small, 
sharp-lipped aperture, but is much more ventricose, and has the 
whorls shouldered. H. microstoma has a thickened lip, and a more 
dead, striated surface. 
Figures 96, 96 a, two views of the shell. 
ACHATINELLA acuminata (Gould). 
Testa parva, elongata, turrita, lucida, glaberrima, nitida, succinea : 
spira elevata, anfractibus sex obliquis, convextusculis, ultimo trientes 
duos longitudinis equante: apertura angusta, sub-elliptica, peristomate 
