102 



MANTTAL OP THE MOLLTJSCA. 



highly coloured, with a liydrophanous epidermis, the bands be- 

 coming translucent "when wetted ; others, like the well-known 

 B. pervei'sus, rejDresent the typical Brazilian forms. To these 

 islands belong most of the helicina- shaped Cydopliori {Lepto- 

 poma.) 



The fresh- water shells are numerous; above 100 were obtained 

 by Mr. Cuming, including many species of Melania (54 ?), Navi- 

 cella lineafa, and siihorliicularis, 5 species of Glaucomya, Unto 

 verecundus, a Corhicula, and 11 sj). (?) of Cyrena. 



Celebes and Moluccas. From these islands we have on record, 

 at present, 16 species of Helix, Nanina 19, Bulimus 3, Vitrina 

 2 (viridis and flammulata, Quoy), Cyclophorus 1. In the 

 fresh-water ponds and rivulets Mr. A. Adams found species of 

 Melania, Assiminea, Ampullaria, and Navicella ; Auricula 

 subulata and Conovulus leucodon. Neritina sulcata was found 

 on the foliage of trees several hundred yards from the water. 



9. Java. 



The Java group, including Floris and Timor, have been par- 

 tially explored from the head-quarters of the Dutch settlement 

 at Batavia. The land and fresh-water shells are nearly all 

 peculiar, a few only being common to the Philippines and North 

 Australia ; they have been described and figured by M. Albert 

 Mousson (8vo. Zurich, 1849, 22 plates). 



Platycloster ? 3 Na%'icella 2 



Meghimatium 2 



Unio and i 



Sj'mplij-nota S 



Alasmodon 2 



Anodon 1 



Cj-clotus 2 Melania 5 CjTena 7 



Helix 15 



Nanina 8 



Aiioplianta 1 



Eulimus 10 



Clausilia 6 



Cj'clophorus 4 



Limnsea'. 1 



Auricula 2 



Leptopoma 



Ampullaria 



1 



Corbicula 



Pai'iuacclla 3 Neritina 2 



10. BOENEO. 



The land shells of this great island are almost unknown, and 

 the only reason for mentioning it separately is the doubt whether 

 it should be considered part of the Javanese Province, or asso- 

 ciated with the Moluccas and Philippines. 



Helix 12 



Nanina 8 



Bulimus 1 



Leptopoma 3 



Cyclotus 1 



Pterocyclus 2 



Paxillus 1 



Succinea 2 



Cyclophorus 2 



The fresh-water bivalves are Glaucomya rostralis, Corbicula 

 tumida, and Cyrena triangularis. Pholas rivicola was found 



