3i6 Quarterly Journal of Conchology. 



D. Society Islands. These have been very well explored by- 

 Pease and others, and probably we are now acquainted with the 

 greater part of their land shells. The genus Partida here attains 

 its maximum, no fewer than 42 species being recorded. It is, 

 however, probable that some of these will not stand. Succmea 

 abounds (11 species). Oi Patula there are 8 and oi Endodonia 6 

 species. There are several small Zonitidce. The operculate shells 

 almost all belong to Realia (14) and Helicina (12). The only 

 other operculates are one species each of Cyclophorus and 

 Chond?-ella. 



E. Austral Islands, including Opara. The most striking peculi- 

 arity of these islands is the occurrence of a species of Stoastoma, 

 a genus otherwise exclusively West Indian. The other land shells 

 belong to groups common in the neighbouring islands, and include 

 6 species of Endodonta and 5 of Tornatellina. 



F. Low Islands. We now come to the extreme eastern part of 

 the Polynesian Archipelago, where the fauna is the poorest. Only 

 20 species have been recorded from these islands, of which five 

 belong to Microcystis and five to Helicina. Endodonta and Realia 

 have each 2, and Fitys, Partula, Pupa, Cyclophorus, Cyclomorpha 

 and Chondrella i species. 



G. Marquesas. We now begin to work our way back by the 

 north. In the Marquesas we have the usual Polynesian fauna, of 

 about 24 species, Pitys, Partula, Tornatellina, Realia, Helicina, 

 etc. The only peculiarity is the existence of 2 species of Vitrina. 



H. Phcenix, Ellice, KingsmiH, and Marshall Islands. These are 

 chiefly coral islets and have yielded very little. The genera are 

 Nanina 2, Patula i, Pitys i, Stenogyra i, Tornatellina 1, Pupa i, 

 Realia 3, Helicina 2. 



I. Caroline Islands. Returning to the westward we find a 

 somewhat richer fauna. One species each of Rhysota and Pupina 



