208 Quarterly Journal of ConcJwlogy. 



mend all who wish to study this fauna to consult that author's 

 " Voyage du Dr. Welwitsch dans les royaumes d' Angola et de 

 Benguela," and ''Series Conchyliologiques i'^''« livraison." Nauina 

 is pretty abundant, especially the subgenus Thapsia. Streptaxis 

 has several species, including the fine S. nobilis from Liberia, 

 Helix proper is almost absent. Ennea are numerous. Oi Bull/ninus 

 there are 1 5 species of the s.g. J^liacliis. A peculiar group of she' Is is 

 found, referred by some to Glandina, but more probably belonging 

 to Stenogyra, S. Fraseri, etc. Limicolaria, Ferideris and Achatina 

 are very fine and abundant, indeed this may be considered the 

 metropolis of that group. The fine genus Fseudachatina is peculiar. 

 Operculate shells are excessively rare. Only two species of 

 Cyclophorus have been recorded. One species of Carycldum has 

 occurred. 



Prince's Island, in the Gulf of Guinea, has an interesting fauna. 

 Besides a few species of the Continental genera, there are four of 

 the curious genus Stteptostele and two of Columna. Nanina Folini 

 and Adansonm belong to a peculiar conical group and Achatina 

 sinistrorsa is remarkable, not only for the reason implied in its name, 

 but from its large size for a species of so small an island. St. 

 1 h )mas and Fernando Po are less rich, or perhaps less explored, 

 each has a species of Fseudachatina and in the former is found the 

 curious Achatina? barhigera. 



2. SOUTH AFRICAN REGION. In this region, of which the 

 northern boundary may be taken to be the Tropic of Capricorn, 

 we have a fauna which, while it has some features in common 

 with the VVestern Region, has also many striking peculiarities. 

 Achatina of large size still occur, ai.d i species of Zin/icola/ia has 

 been found. Ennea is pretty abundant, especially in Natal. On 

 the other hand, the true Helices re -appear, the principal subgenus 

 being Fella (27 species), a group almost peculiar to the Cape. 

 There are 6 species of Dor casta {PL globulus, etc.), i ^£7 ope, 



