GASTEROPODA. 29 
tncrementi exilibus et interdum linets inordinatis volventibus striata : 
spira brevis, acuta, anfractibus vix tribus, convexis, sutura profundis- 
stma discretis, ultimo ventricoso: apertura magna, rotundato-ovata ; 
columella carinata sub-incrassata, haud sinuosa: intus calcarea. 
Succinea crocata, GouLp; Proceed. Boston Soc. Nat. Hist., ii. 183. 
Nov. 1846. Expedition Shells, 29. Pretmrer; Monog. Helic., ii. 520. 
ANIMAL small for the shell, of a delicate rose-colour with straw- 
coloured reflections, having an umber stripe along the median line, 
and an oblique one on each side directed towards the oral tentacle; 
sides marked with delicate diverging furrows. 
Suey. A very large, inflated species. quite solid and nearly opaque, 
of a deep saffron-colour; the surface has but little lustre, is marked 
with fine and regular lines of increment, and sometimes with irregular, 
interrupted, revolving ridges and furrows. ‘There are scarcely three 
whorls, the first two of which are convex, and separated by a very 
deep suture, and form a short, well-developed spire; the last is large 
afd greatly inflated. The aperture is large, rounded ovate, the lip pass- 
ing round without any sinuosity at the columella, and but slightly 
thickened there. 
Length of axis five-eighths of an inch; breadth half an inch. 
Found abundantly in very moist and in shady places, at an elevation 
of 1200 feet, at Upolu and other islands of the Navigator Group. 
This remarkable shell may be readily known by its large size, 
inflated form, and its peculiar colour. The spire is remarkably con- 
torted. 
Figure 21, the front; 21 a, profile of the shell ; 21 4, the animal with 
the shell. 
NANINA RUBRICATA (Gould). 
Testa globoso-conica, solida, vix perforata, supra nitida, rufo-castanea, 
strus radiantibus gregatim dispositis et striis volventibus decussata, 
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