20 MOLLUSCA. 
A most remarkable, tunnel-shaped species, resembling precisely the 
sugar-cockles of the confectioners. It is allied to S. procera, which 
has all the outlines a little convex, an amber colour, and no inflection 
of the columellar margin. 
Figure 26, the aperture, and 26 a, the profile view enlarged; 26 3, 
natural size ; 26 c, the animal with the shell; 26 d, head of the animal. 
SUCCINEA PROCERA (Gould). 
Testa magna, elongata, lanceolata, fulvo-cornea, striis incrementalibus 
crassis rugosa: spira acuta, anfractibus tribus perobliquis convext- 
usculis composita, partem longitudins fere dimidiam equans : aper- 
tura ovato-oblongata; labro postice decurrente ; columella arcuatd, 
sub-incrassata. 
Succinea procera, Gourd; Proceed. Boston Soc. Nat. Hist., 11. 187. 
Dec. 1846. Expedition Shells, 30. 
Anat pale yellowish, roseate on the sides of the neck, with a dark 
stripe running back from each tentacle ; on the sides are fine diverging 
dusky lines, and scattered black dots; tentacles small. 
Suet rather large, elongated, pale brownish horn-colour, the sur- 
face wrinkled with coarse lines of growth; spire tapering and acute, 
composed of three very oblique whorls; suture deep. Aperture 
rounded-ovate, rather more than half the length of the shell; the 
outer lip returning somewhat down the right side of the posterior 
angle; columellar lip regularly arched, slightly thickened. 
Length of the axis seven-tenths of an inch; breadth three-tenths of 
an inch. 
Found at various places on the islands of Tahiti and Eimeo. 
A large, remarkably slender species, of coarse exterior, somewhat 
like S. infundibuliformis, but resembling, much more, specimens of 
our Limnea umbrosa. 
