62 
TERRESTRIAL MOLLTJSCA INHABITING SOCIETY ISLANDS. 
They vary some in size and lengtli of spire. Ihe nearest allied species is 1 . 
planiJabrnm, which is larger, differently colored and inhaliits a different station. I 
have fonnd .several hybrids between this species and P. faha, var. mibangvhifa. Pease. 
In referring to the synonymy it will be ob, served that Carpenter and Cuming 
regarded it as a variety of Reeve’s P. solidnla. Mr. Pease, accepting their views, 
catalogued it by the latter name in his list of Polynesian land shells (P. Z. S., 1871, 
p. 473). Both Reeve’s and Pfeiffer’s description, as well as Reeve’s figure, refer to a 
more robust species than virgivea. Moreover, neither of the above authors allude to 
the parietal tooth, which is seldom absent in the latter species. Reeve’s figure very 
nearly coincides with Pea.se’s P. compacta, but that species is always dentate. Hybrids 
between P. foha, var., and virginea, which are edentate, very closely resemble Reeve’s 
figure of solidnla. 
P. AKOUTA, Pease. PI. Ill, fig. .57. 
Dulimus argutus, Pease, Proc. Zool. Soc., 1864, p. 670; 1871, p. 473. Pfeiffer, Mon. Ilel., 
vi, p. 46. 
J’artula arguta, Schmeltz, Cat. Mus. Godeff., v, p. 92. Martens and Langk., Don. Bismark., 
p. 55, PI. Ill, fig. 7. (Echo) Hartman, Cat. Part., p. 11 (with woodcut) ; Obs. Gen. Part., 
Bui. Mus. Com. Zool., ix, p. 179. 
I he metro])olis of this very fragile species is in the upper portion of a mountain 
ravine, on the west coast of Huaheine, where it is rather common on the leaves of low 
shrubs and ferns. It occurs much more rarely in a neighboring valley south of its 
specific centre. Mr. Pease’s habitat “ Tahiti,” as given in his list of Polyne.sian laud 
shells, is decidedly wrong. 
1 hough referred by the above author to the genus Bidimm, it is, nevertheless a 
true The aiiimnl, which is viviparous, has verv long, slender, ocular tentacles 
long lanee-pointed foot, and that portion of the animal occupying the whorls of the 
translucent shells „ beautifully maculated with black and white simts on grayish 
yellow ground. The shell, which is very uniform in all its specific characters, may Im 
readily distinguished hy its very thin pellucid texture, ovate form, abbreviated sidre, 
siXi-pel;:: 
P. bilineata, Pea.se. 
Pariula ftiluieate, Pease, Amer. Jour. Conch. 1866 n 901- iss- m r r, 
% loTanimyy' '^tifff "Z: 
Porta/o C.rpeuter (not of Broderip), P,.„c, Zool. Soc., 1864, „. 615 
This beautiful and well-marked species is couhned to Faa-apa valley on the east 
