Quarterly foiirnal of Conchology. 309 



ever, we expressed doubts as to the generic position of C. Ciim- 

 ingiana. Not possessing the species in our collection, we could 

 not pretend to decide on its true genus. 



Stenogyra is numerous (10 species). The operculate shells 

 chiefly belong to the genera Cydophoriis, of which there are 16 

 handsome species, though scarcely so fine as those of Burmah, 

 and Leptopoma 22, Cy clot us has 7 species, Alycixus i, Arinia i, 

 Megalomastoma i, Pupinella 2, Pupina 7, and Helicina 9 species. 

 We may remark the greater numbers of Pupina and Helicina, 

 together with the reduction of the tubiferous genera to a single 

 Alycceus, as indicating the passage to the Australasian fauna. 



8. Borneo is still very imperfectly explored. The largest 

 collections have been made in the Island of Labuan, and in 

 Sarawak. The I\lanince are numerous and fine, especially the 

 splendid reversed shell N. Brookei. Amongst the Eel ces, nasuta 

 may be mentioned as a most remarkable form; there are, however, 

 few true Helices known as yet from Borneo, and Cochlostyla 

 is only represented by i, and Amphidromus by 2 species. 

 There is i Electra, and 2 Clausilice are .found. The operculate 

 fauna is interesting. There is i species of the curious genus 

 Opisthostovia, in which the last whorl turns up in the form of a 

 tube in a most extraordinary fashion (O. Crespignyi). There are 

 said to be 3 species of Paxillus but their specific distinction is 

 rather doubtful. Ihe other operculate genera are Cyclotus 2, 

 Opi^thoporus 3, I teocyclos 5, Alycoms 3, Diplommatina i, 

 Cyclophorus 5. Lepiopoma 6, Megalomastoma 3, Rhaphaulus 2, 

 Pupinella i, Realia 5, Helicina 2. The most complete account 

 of the Bornean land shells is Prof. Issel's " Molluschi Borneensi"; 

 Borneo, however^, together with all the Dutch Islands is also 

 treated of at length in V. Martens' " Psische Expedition." 



9. Sumatra to Bali. The chain including Sumatra, Java, Bali, 

 and the neighbouring small islands may be considered as a distinct 



