102 TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
Helicina solidula, Frauenfeld (not of Gray), Verh. Zool. Bot. Ges. Wien, xix, p. 879. 
Helicina crassilabris, Schmeltz (not of Philippi), Cat. Mus. Godeff., v, p. 99. 
A common species, peculiar to Tahiti, where they are found on the trunks of trees 
and bushes, 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 whitish 
or yellowish white, rarely lemon-yellow or uniform reddish of various shades, or the 
two 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 
horn-color. 
Major diam. 5-9 mill. 
H. corrugara, Pease. Plate IIT, fig. 62, 62 a, 62 b. 
Helicina corrugata, Pease, Proc. Zool. Soc., 1864, p. 673. Pfeiffer, Mon. Pneum., iv, p. 252. 
Not abundant, and, so far as known, is confined to Raiatea, where it occurs on 
the ground, and sometimes on the trunks of trees. 
It may be distinguished by its more or less depressed spire, thin texture, sharp, 
slightly expanded lip, which is emarginated 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. rustica, Pfeiffer. 
Helivina pallida, Pfeiffer (not of Gould), Zeits. Malak., 1848, p. 86. 
Helicina rustica, Pfeiffer, Chem., ed. 2d, No. 25, p. 26, Pl. IX, figs. 26-29; Mon. Pneum., i, 
p. 857. Gray, Cat. Phan., p. 258. (Jdesa) H. and A. Adams, Gen. Moll., ii, p. 304. 
Pease, Proc. Zool. Soc., 1871, p. 476. 
Helicina rugulosa, Pease, Amer. Jour. Conch., 1868, p. 157, Pl. XII, fig. 2; Proc. Zool. 
Soc., 1871, p. 476. Pfeiffer, Mon. Pneum., iv, p. 258. 
This small species, which is not uncommon, is generally diffused throughout the 
group, and is found on the ground, ranging from the lowlands near the seashore to 
500 feet above sea-level. 
Mr. Pease’s sugulosa is without doubt a synonym of rustica. The oblique ribs or 
coarse striw vary from costulate to striate. The small size, uniform color, which is 
usually pale corneous, sometimes light reddish brown or luteous, depressed body-whorl 
and straight simple peristome will distinguish it. Some examples are smaller (24 
mill.) than the dimensions given by Pfeiffer and Pease, and have a more elevated 
spire and less depressed body-whorl. 
H. mintara, Lesson. Plate III, figs. 63, 63a. 
Helicina miniata, Lesson, Voy. Coquille, p. 349, Pl. XIII, fig. 9. Pfeiffer, Mon. Pneum., i, 
p- 849. Gray, Cat. Phan., p. 251. (Hmoda) H. and A. Adams, Gen. Moll., p. 304. 
Mart. and Lang., Don. Bism., p. 60, Pl. III, fig. 23. Pease, Proc. Zool. Soc., 1871, p. 476. 
Helicina rufescens, “ Pease,” MS. Carpenter, Proce. Zool. Soc., 1864, p. 676. 
