393 



MANUAL OP THE MOLLUSCA. 



Two laKge species of Achatlna (fidica and 'panthera) abounding in tlie 

 coffee plantations, are believed to have been introduced. The fall of rain in 

 Mauritius is 35.25. 



Bourbon, (No. 33). 

 Helix cajlatura Helix tortula 



„ detecta „ Brandiana 



„ delibata ? Pupa Largillierti — IMauritius. 



Rodriguez. 

 Cyclostoma articulatum Madagascar? Streptaxis— pyriformis. 



No. 34. Kerguelen's Land. Helix Hookeri was collected at this island 

 when visited by the Antarctic Expedition. 



6. Indian Eegion. 



Proceeding eastward, in Asia, the species of Achatina, Pwpa, Clausilia, 

 Phjsa, Lbnax, and Cyclostoma rapidly diminish or quite disappear. Helices 

 of the section Nanina become plentiful, amounting to 150 species, and Buli- 

 mulus and Cyclophorus attain their maximum. Leptopoma and Fnpina are 

 peculiar to the Asiatic islands. 



Our catalogue of Indian land shells must be very imperfect, including only 

 about 180 Eelicidce and 50 Cyclostomidce. A very few of the Indian species 

 are common to China and the Asiatic Islands, or even to Ceylon. The shells 

 of northern India resemble those of the Lusitauian region ; in the south they 



