TERRESTRIAL MOLLTJSCA INHABITING SOCIETY ISLANDS. 
Ill 
Out of the 139 species collected by the writer, 108 are peculiar to the group. 
They are all embraced in 25 genera, 7 of which are opcrculated. The excessive 
preponderance of indigenous species in the archipelago clearly demonstrates its claims 
to a special land-shell fauna. 
With the exception of the species of Melampus and Partuki Injalina, all the land 
shells which are common to other groups are invariably small species. Mycroeijstis 
conula and M. Discordtee are common to the Cook’s, and the latter also occurs in the 
Marquesas Islands. If. calculosa is found in the latter group and the Viti Islands. 
Stenogyra Tuckeri and Vertigo pediculus are diffused throughout Polynesia. Vertigo 
tantilla inhabits the Cook’s, Samoa and Viti Islands. TornatelHna aperta occurs in the 
Marquesas. T. Philijpii extends its range to the Austral, Cook’s and Marquesas. T. 
conica, ohionga and nitida live on all the south Polynesian groups; and T. serrata, 
together with ohionga, also occur in the Kingsmill and Caroline Islands. T. perplexa 
inhabits all the southeastern groups. Partida hyalma is common to the Austral and 
Mangaia, one of the Cook’s Islands. Patida modicella ranges from the Paumotu to 
the Ellice’s group. Limax Raratonganus inhabits the Cook’s and probably the 
Gambler Is. Chondrella parva is common to the Marquesas, and G. insularis occurs 
in the Gambler group. G. striata is abundant in the Austral and Cook’s Islands. 
ILlidna miniita is found in the Austral, and IT. flavescens in the Cook’s group. 
A’-siminea nitida ranges from the Paumotu to the Viti Islands. Plecotrema mordax 
occurs in the Paumotu, and I think inhabits the Gambler Islands. Laimodonta 
conica ranges from the Paumotu to the Cook’s, and occurs on the islands in central 
Pacific. All the Melarripi, except striaius, have a more or less wide range. 
The following species, unknown to the writer, are accredited to the Society 
Islands : — 
Helix (ceanica, Lc Guillou. “Taiti.” Is a Libera and probably = L. Heyne- 
manni. No mention is made of internal lamella 
Helix Jacquinoti, Pfeiffer. “ Tahiti ” and “ Marquesas.” In his Mon. Hel., vii, 
he qnotes “ Taheita ” only. It is a Libera with the peculiar sculpture of L. fratercula, 
and probably inhabits the Austral Islands. 
Helix dejrressi/ormis. Pease. “ Tahiti.” May be a Zonites. 
Succinea procera, Gould. “ Eimeo ” = Moorea. Possibly a large elongate form 
of the variable S. pudorina. ■ 
Snccima Bernardii, Recluz. “ Oceania ” (Recluz) ; “ Tahiti ” (Cuming). 
Gyclostoma ventricosa, Hombron and Jacquinot. “Taheiti.” Pfeiffer quotes the 
“ Marquesas.” Should be compared with Atropis viridescens. 
Hydrocena Scherzeri, Zelebor. “ Tahiti.” Is, I think, a variety of Omphalotropts 
scitula. 
