2 MELVILL & STANDEN, Mollusca from N.E. Rhodesia. 



area indeed, but which during the past twenty or more 

 years has been especially studied, and the results given to 

 the world in such classical treatises as Dr. Eduard von 

 Martens' "Beschalte Weichthiere Ost-Afrikas " (1897). In 

 this the author, whose recent demise has been universally 

 deplored, names about 420 species as occurring in that 

 region, a number now considerably augmented. Another 

 work of great interest is that of J. R. Bourguignat, 

 " Mollusques de l'Afrique equinoctiale " (1889). M. M. 

 Dupuis and Putzeys have mainly studied the mollusca 

 of the Congo basin, while the late C. F. Ancey*, in a more 

 general way, has described many species from several 

 tropical areas. Lastly, Mr. Edgar A. Smith, I.S.O., has 

 published much on the subject during the past five and 

 twenty years, and to him we are now especially indebted 

 for having examined, in our company, the whole of Mr. 

 Neave's gatherings, and given the benefit of his advice 

 and past experience with regard to them. Our thanks 

 are also due to the authorities of the Manchester Museum, 

 for having requested us to undertake the following enu- 

 meration, and placing all facilities in our way. The types 

 will be placed in the Manchester Museum. 



Localities visited. 



Mr. Sheffield Neave writes regarding this : — 



Petanke. The majority of the mollusca collected 



came from Petauke or its immediate neighbourhood. 



This is the Government Station of the westernmost section 



of the East Loangwa district, and lies some 25 miles east 



of that river, and some 600 feet above it. Elevation 



about 2,400 feet. 



The country here is mountainous and wooded 



Burtoa arnoldi (nilotica) and the Achatince generally are 



*lt was whilst writing this present paper that we heard, with much 

 regret, of the death of M. Ancey, in the autumn of 1906. 



