TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 87 
measurements. When the above author described his S. rusticana, he remarked that 
it resembled his pudorina. Our shells, certainly, do agree so nearly with that species 
as to fully convince me of the correctness of my determination. 
Mr. Pease, in his remarks on the Tahitian Succinee, published in the “ Proceedings 
of the Zoological Society ” for 1864, and his “ List of Polynesian land shells” (1. c.) 
for 1871, considers pudorina a doubtful species. I cannot understand how he could 
have overlooked the specific characters of this shell which harmonize so well with 
Gould’s description. I can only attribute it to his having referred them to Gould’s 
procera, a species unknown to me, but said to have been collected on Moorea, which I 
very much doubt, unless it should prove to be identical with the species under con- 
sideration. 
Having sent a number of specimens to Godeffroy’s Museum, they were, by Prof. 
Mousson, referred to pudorina.  Pfeiffer’s Gouldiana is, without much doubt, the same 
as Gould’s species. I also add to the synonymy my De Gagei, inhabiting Rurutu, one 
of the Austral islands. 
It is a variable species as regards size, shape and the length of the spire. It is 
paler-colored, smoother, and the body is smaller and not so much inflated as the 
preceding three species. Some examples are transversely malleated or indistinctly 
grooved very rarely with a slight depression on the shoulder. The more attenuated 
forms closely resemble Baird’s 8. Haawkinsii, and the abbreviate specimens approach 
in outline Binney’s figure of S. Totteniana. 
S. cosTuLosa, Pease. Plate IT, fig. 4. 
Succinea costulosa, Pease, Proc. Zool. Soc., 1864, p. 677; 1871, p. 472. Pfeiffer, Mon. Hel., 
v, p. 31. Garrett, Jour. Acad. Nat. Sci. Phila., 1881, p. 401. 
This well-marked species only occurred to my notice in Fautana valley on the 
northwest side of Tahiti. They were found on foliage, about two miles inland, and 
confined to a small area of several acres, but were not plentiful. 
Its small size, abbreviate shape and strongly developed striz are its most obvious 
characters. 
It occurs, also, at Aitutake, one of the Cook’s or Harvey Islands. 
S. INFUNDIBULIFORMIS, Gould. 
Succinea infundibuliformis, Gould, Proce. Bost. Soc. Nat. Hist., 1846, p. 186; Expl. Ex. 
Shells, p. 19, fig. 26. Pfeiffer, Mon. Hel., ii, p. 520... H. and A. Adams, Gen. Moll., ii, p. 
129. Pease, Proe. Zool. Soc., 1864, p. 677. 
Truella infundibuliformis, Pease, Proc. Zool. Soe., 1871, pp. 459, 472. 
I found a few examples of this well-characterized species on the ground in forests 
on the southwest coast of Tahiti. Dr. Gould mentions Moorea as one of its habitats ; 
though carefully searched for, I failed to detect it on any part of the island, and doubt 
its existence there. 
