JONES & PRESTON : ON CHINESE AND BORNEAN MOLLUSCA. 139 



The country in the vicinity of Shanghai is formed entirely of the 

 alluvial deposit of the great Yangtze River, and is cultivated to the 

 utmost. 



The island of Shawei Shan, a patch of volcanic matter a few acres 

 in extent, situated at the entrance to the northern mouth of the 

 Yangtze River, and twelve miles from the nearest land, requires to he 

 mentioned here, as also do the Chusans, an archipelago of mountainous, 

 highly cultivated islands, none of them of large size, which lie off 

 the coast, about eighty to a hundi-ed miles from Shanghai itself, and 

 which appear to be rather rich, for China, in fluviatile molluscs. 



Wei Hai Wei, as generally understood, consists of a small island, 

 Leu Kung Tau, on which the naval establishment is situated, and 

 the adjoining mainland; and, in addition to this, some fifty miles of 

 the coast of Shantung was surveyed by the " Waterwitch," as well 

 as a place called Shi Tao at the south-east corner of the Shantung 

 Promontory, and some seventy miles from Wei Hai Wei by sea. 

 The country is barren, sandy, and dry, with rocky hills and few 

 rivers and streams ; it is poorly wooded, but, as in most other parts 

 of China, is cultivated to its fullest extent. It is a disappointing 

 country from a molluscan point of view, although four new species of 

 Linmcea were obtained from it. 



It must be admitted that the results of the collecting in the various 

 above-named localities was, on the whole, disappointing. Terrestrial 

 molluscs are, however, nearly always the reverse of abundant where 

 igneous rocks are found, and China did not, at least in those parts 

 visited, display the expected variety of fluviatile forms ; whilst, 

 with regard to marine species, although plentiful, it is regretted 

 that time did not permit for more extended and careful search on 

 their behalf. 



LIST OF SPECIES. 



1. Hemiplegia densa (Ad. & Eve.). 

 Obtained in British North Borneo. 



2. Macrochlamys consul (Pfr.). 



Doat Island, near Labuan ; British North Borneo, in old jungle. 



3. Macrochlamys jucunda (Pfr.). 



Doat Island, near Labuan ; British North Borneo. 



4. Camcena xanthoderma, MlldfF. 



A few dead specimens at Hoi Ha in the new territory, opposite to 

 Hong Kong. 



5. Camcena cicatricosa (Miill.). 



Pound commonly in the garden of the British Yamen in the heart 

 of Canton native city, and also in gardens at Hong Kong. Only dead 

 shells were obtained. 



