The Non-Marine MoUusca of Portuguese East Africa. 109 



of Mr. John Reed, Secretary of the Beira and Mashonaland Railway, I have 

 received two interesting little collections made by B. F. Mcdowell at stations 

 on that line ; while the Rev. H. A. Junod has renewed his valuable researches 

 in the southern portion of the territory, and Miss Wilman, Director of the 

 M'Gregor Museum, Kimberley, most kindly arranged that his fine collection 

 should be submitted to me for examination. Finally, I am much indebted 

 to Messrs. K. H. Barnard and H. C. Burnup for the sight of still further 

 material collected by H. W. Bell Marley in the Magude district, and Dr. F. G. 

 Cawston at Beira and Delagoa Bay. 



The natural result is the addition of very many new names to the South 

 African faunal list, as well as to that of Portuguese East Africa ; in fact, the 

 latter is almost doubled by the recent discoveries,, the present record com- 

 prising 111 land and 43 aquatic species, a total of 154, as against that of 84 

 just mentioned. 



As might be expected, the Portuguese territory is a half-way house 

 between South and Central African forms. From Delagoa Bay, in the south, 

 hardly a species is recorded which is not also common to the Transvaal or 

 Natal, but north of the Beira railway, whence most of the new material is 

 derived, southern forms become inconspicuous or disappear, and the larger 

 species are more characteristic of the fauna of tropical Africa than of the 

 more temperate southern part of the continent, several having already been 

 described from Nyasaland or further north. 



An exact analysis shows that, of the 154 species now listed, 68 have not 

 yet been collected outside the latitudes of Portuguese East Africa ; 21 are 

 common to districts both north and south of that territory ; 27 are only 

 recorded otherwise from Central, and 38 from South Africa, but 23 of these 

 hail from the Delagoa district, and some of them are very doubtfully 

 authenticated. Only 35 species are yet chronicled from Mozambique, none 

 of which is a purely South African form, while no fewer than 9 are unknown 

 south of the Zambesi. 



In addition to many friends, whose kind assistance in the preparation 

 of this work is acknowledged elsewhere, I must express above all my extreme 

 indebtedness to H. Watson for his great kindness in reporting on the anatomy 

 of many of the species. The whole of the anatomical details are solely from 

 his pen, as are the many text-figures and four beautiful plates in illustration 

 of his letterpress. 



The following list sets forth in generic sequence all the land and fresh- 

 water mollusca, as far as I can trace the records, which are believed to in- 

 habit Mozambique and Lorenzo Marques. Few references to literature are 

 appended, as these were either given in full in my Revised Reference List,* 

 or will be included in a supplement thereto, now in course of preparation. 

 * Ann. S. Afr. Mus., xi, 1912, pp. 59-307. 



