26 MOLLUSCA. 
verse wrinkles. Spire exserted, tip obtuse, whorls two and a half, 
ventricose, separated by a deep suture, the apicial one buried in the 
following one. Aperture rounded-ovate, region of the columella 
notably sinuous, almost umbilicated ; lip thin, slightly reflexed. 
Length of axis one-third of an inch; breadth one-fifth of an inch. 
Inhabits the island of Manua, near the Society Islands, where it 
was collected by Mr. Couthouy. 
A small, plump species resembling S. Magellanica, but still more 
ventricose, and distinguished from it by its pale colour and opaque 
structure. It is also closely allied to S. venusta. 
Figure 23, the aperture, and 23 a, profile view of the shell, magni- 
fied ; 23 4, natural size. 
Succrnea capuca (Mighels). 
Testa parva, ovato-turrita, pallidé virens, sub-opaca, impolita, striis in- 
crementalibus confertis, conspicuis insculpta : spira anfractibus tribus 
cum dimidio ventricosis ; sutura profunda : apertura ovata, dimidiam 
longitudinis teste aliquid superans ; columella nec sinuatd, nec callosa. 
Succinea caduca, Micuets; Proceed. Boston Soc. Nat. Hist., 1. 21. 
Jan. 1845. Pretrrer; Monog. Helic. viv. 11. 519. 
SHELL small, turreted ovate, somewhat reflexed, thin, semi-transpa- 
rent, of a pale, faded green colour, the surface deadened by crowded, 
rather loose lines of growth. Whorls three and a half, rounded, the 
last one sub-globose, the others separated by an impressed suture, and 
forming an acute, prominent spire. The aperture is about five-eighths 
the length of the shell, small, broadly ovate ; the columellar portion of 
the body is large and rounded, not enamelled, and without a conspi- 
cuous, columellar fold. 
Length of axis three-tenths of an inch; greatest breadth three-twen- 
tieths, lesser breadth one-eighth of an inch. 
