Q4 MOLLUSCA. 
~ 
Suet of small size and regular proportions, regularly ovate, the 
spire prominent and somewhat reflexed, but conforming to the other 
outlines. It is thin and transparent, smooth and shining, of a pale 
golden-green colour, with delicate lines of growth and occasional ves- 
tiges of revolving lines, which, however, never seem to be complete. 
Whorls three, regularly rounded; body beneath ventricose, with a 
distinct flexure at the umbilical region, so that the columellar margin 
is prominent and thickened at that part; still higher up is the regular 
columellar fold. Aperture rounded-ovate, three-fourths the length of 
the shell. 
Length of axis one-third of an inch; breadth two-ninths of an inch. 
Found at Tahiti and Eimeo, Society Islands, and also at Upolu, 
Samoa Islands. 
Like a small S. campestris, Say. Differs from S. venusta by its 
shorter spire, pale greenish colour, and more arcuated columella. 
Figure 24, the aperture, 24 a, profile of the shell, and 24 d, side of 
the shell with the animal, twice the natural size ; 24 c, natural size. 
SuccinEa MacELvanica (Gould). 
Testa parva, tenuis, subflexilis, lucida, nitida, intensé virens, rotundato- 
ovata: spira brevis, acuta, anfractibus tribus, sutura profunda discre- 
lis, ultimo amplo, ventricoso: apertura ovata; margine columellart 
reflexiusculo, callo tent supernée munito. 
Succinea Magellanica, Goutp ; Proceed. Boston Soc. Nat. Hist., 11. 
185. Nov. 1846. Expedition Shells, 29. 
AnimaL much too large for the shell; foot broad, hght brown under- 
neath ; head and neck dark brown, passing into rufous brown on the 
sides, and into yellowish on the margin of the foot; the sides are 
marked by numerous diverging lines, extending from the collar toa 
furrow just above the margin of the foot; from this marginal furrow 
lines pass perpendicularly to the margin of the foot; cervical tentacles 
long and robust, oral ones very short. Respiratory orifice very small. 
