38 TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
diffused over the island, it has not, so far as known, been detected in any other 
location. 
On breaking away about one-fourth or one-third of the last whorl, there may be 
observed a second lamina on the penultimate whorl, and two or three in the palate 
beneath the keel, and frequently one above. On exposing these deeply seated lamin, 
the aperture is precisely like the Sandwich Islands types. 
This shell may be distinguished by its depressed convex spire, flattened whorls, and 
the color, which is dull corneous, is profusely spotted and striped with reddish brown. 
In adults the peristome is gently and regularly curved from the termination of the 
keel to the columellar region. 
E. ricra, Pease. Plate II, figs. 25, 25 a, 25d. 
Helix ficta, Pease, Proc. Zool. Soc., 1864, p. 669. Pfeiffer, Mon. Hel., v, p. 223. 
Endodonta ficta, Pease, Proc. Zool. Soc., 1871, pp. 455, 474. 
This species is confined to Tahaa, not ‘ Raiatea,” as stated by Pease, where it 
occurs plentifully, associated with EB. fabrefacta. 
Besides the constant single parietal lamina mentioned by Pease, there is a second 
one deeply seated in the palate between the keel and base of the shell. 
As compared with the preceding species, which it closely resembles in texture, 
color and markings, it is larger, has one more whorl, the umbilicus wider and its 
margin more acutely angulate, and the aperture more decidedly rhomboidal in outline. 
The upper surface of the last whorl is more or less distinctly concave or sulcated next 
to the suture, a character not observed in Hiaheinensis. 
KE. FABREFACTA, Pease. 
Helix fabrefacta, Pease, Proc. Zool. Soc., 1864, p. 669. Pfeiffer, Mon. Hel., v, p. 190; 
vii, p, 210; Novit. Conch., fase. xxxvi, p. 505, Pl. CVIII, figs. 28-31. 
Endodonta fabrefacta, Pease, Proc. Zool. Soc., 1871, p. 474. 
Patula fabrefacta, Schmeltz, Cat. Mus. Godeff., v, p. 207. 
Patula conicava, ‘* Mousson,” Schmeltz, Cat. Mus. Godeff., iv, p. 72. Paetel, Cat. Conch , 
p. 89. 
Helix conicava, Pfeiffer, Mon. Hel., vii, p. 480 (name only). 
A common species, confined to four large valleys on Raiatea, and one on the east 
coast of Tahaa. On the ground in forests. 
This is one of the aberrant species previously alluded to, which in the type is 
entirely destitute of internal lamine. In every other particular, it cannot be distin- 
guished from the typical Endodonta. 
Dr. Pfeiffer has given an accurate description and figures of this species im the 
“ Novitates Conchologicie.” 
It attains a larger size than given by the above author. My largest examples are 
nearly 9 mill. in the greatest diameter by 4 in height. ‘They vary some in the eleva- 
tion of the spire, and the brown spots are occasionally absent. The spire is always 
more or less concave in outline, and the broad umbilicus is funnel-shaped, with planu- 
