102 
TEKllESTKIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
Helicina .olidula, Frauenfeld (not of Gray), Vcrh. Zool. Dot. Gch. Wien, xix, p. 879. 
llelicina cransilabris, Schmeltz (not of Pliilippi), Cut. Mus. Goileff., v, p. 99. 
A conimon species, peculiar to dahiti, wliere they aie found on the trunks of trees 
and Imshes, and are widely diffused throughout the island. They exhibit considerable 
variation in size, color and in the height of the spire. The prevailing tint is wdiitish 
or yellowish white, rarely lemon-yellow or uniform reddish of various shades, or the 
tw'o former colors with reddish spire, and more rarely with a dorsal reddish band. 
The peristome is thick and white, and the basal callus, which is usually of the latter 
color, is sometimes pale bluish white or lemon- yellow. Operculum light yellowish 
hom-color. 
Major diam. 5-9 mill. 
H. CORBUOATA, Peuse. Plate III, fig. 62, 62 a, 62 b. 
Jfelicina corrugala, Pease, Proc. Zool. Soc., 1864, p. 673. Pfeiffer, Mon. Pneum.,iv, p. 252. 
Not abundant, and, so far as known, is confined to Eaiatea, where it occurs on 
the ground, and sometimes on tlie trunks of trees. 
It may be distinguished by its more or less depressed spire, thin texture, sharp, 
slightly expanded lip, wiiich is cmarginated above the carinate periphery, and by the 
slight groove which circumscribes the basal callus. The color is pale reddish brown, 
corneous or pale straw-yellow, rarely variegated. 
Diam. 5 mill. 
H. KusTiCA, Pfeiffer. 
! . „„ uoay-wiiorl. 
H. miniata. Lesson. Plate III, fi^s. 6.^ fi.q . 
