3o6 Quarterly Journal of Conchology. 



(Nicobars), Alycaus (A. &N.), CyclopJiorus (A. & N.), Leptopoma 

 (N.), Cataulus (N.), Pupina (N.), Realia (A.), Helicina (A.& N.) 

 The Cyclophori include the curious lamellated C. foliaceus. The 

 Helicince {H. Andatnanicj, Nicobarica, etc.), are elegant sliells. 



5. China with Formosa. The interior of China is very im- 

 perfectly known, and it would be premature to attempt to fix the 

 exact boundaries between this and other regions. To the north 

 there is evidently an intermixture of Palsearctic forms, and the 

 same thing would appear to be the case on the south-east, the 

 enormous altitude of that part of Central Asia having caused the 

 northern fauna to spread and excluded tropical forms. The most 

 striking peculiarity of the Chinese fauna is the abundance of 

 sinistral Helices, H. cicat/icosa, Christina:, etc. Nanina^ are com- 

 paratively few, whilst true Helices are numerous, especially of the 

 subgenera Cainena, Flectotropis and Fruticicola. Coriila has i 

 species, Obba i, Acusta 2, Hadra 3. Streptaxis is represented by 

 2 species. Stenogyra and Clausilia are both numerous. On the 

 other hand, the operculate shells begin to diminish in numbers, as 

 is always the case as we go towards the north. The following 

 genera exist : Cyclotus 2, Pterocyclos 2, Alyca'us 2, Paxillus i, 

 Cychphorus 3, Otopoma i, Realia i, Cecina i, Helicina i ; 

 but almost all these are from the South of China, except the genus 

 Cecina. 



The Island of Forjiosa has been tolerably Avell explored, 

 chiefly by Mr. Swinhoe. It is principally remarkable for a Puli- 

 minus of very peculiar form, B. sphcEroconus, and for some fine 

 species of Clausilia — Sivinhoei, exilis, etc. 



A good account of the Chinese land shells (then known) will 

 be found in Martens' " Preussische Expedition nach Ostasien." 



The Thibetan shells seem to be largely of Palsearctic forms, 

 the Helices are mostly of the s.g. Fruticicola, and there are no less 



