168 
ZOOLOGICAL LITERATURE. 
genera Achatina, AEtheria, Spathn, and Galatea are the most 
peculiar forms throughout the tropical parts of Africa. 
f Adams_, II. List of Shells collected by S. White Baker, Esq., 
during his recent Explorations in Central Africa. Proc. 
Zool. Soc. 1866, pp. 375, 376. 
One land-shell, Limicolaria tenehrica (Reeve), and eleven 
freshwater shells, two of which (Unio) are new. 
Dourn, H. Die Binnenconchylien von Ilha de Principe. 
Mai. Blatt. xiii. pp. 116-136, with a plate. [The land- and 
freshwater shells of Prince Island, Gulf of Guinea.] 
The author, known for many years as a zealous and judicious 
conchyliologist, has spent some months in exploring that island, 
but, attacked by fever, was unfortunately prevented by the state 
of his health, as well as by the want of goodwill on the part of 
the residents, from exploring the islands of St. Thomas and Fer- 
nando Po. 
'He gives in his paper a list of 18 land-shells, two freshwater 
snails {Neritina), and some submarine species [MelampuSy Trun~ 
catella, and one of the Neritince), the greater part being found 
and examined alive by the author. The predominance of the 
genus Achatinaj the presence of Nanina-\\\^Q snails, and the 
absence of all operculated true land-shells in Western Africa 
are conspicuously confirmed by this list. A new genus, Strepto^ 
stele j the natural affinities of which with Streptaxis and Ennea 
are pointed out by the author, is an interesting addition to 
those already known as characteristic of the African fauna. 
Numerous peculiarities concerning the life, station, and natural 
affinities of the species are to be found’ in this paper. 
Morelet, a. Coquilles nouvelles recueillies par M. Welwitsch 
dans PAfrique equatoriale. Journ. Conch, xiv. pp. 153-163. 
Paiva, Castello de. Dixnouveaux mollusques de Tile de Ma- 
deira. Journ. Conch, xiv. pp. 339-343, with pi. 11. 
Some are fossil or subfossil. 
PFEIFFER, L. Ueber die Auriculaceen der Madera-Gruppe. 
Mai. Blatt. xiii. pp. 143-146. 
One PedipeSj 1 Mai'inula, 3 Alexia, 
7. West Indies. 
Bland, Th. Remarks on the Origin and Distribution of the 
Operculated Land-shells which inhabit the Continent of 
America and the West Indies, with a Catalogue of the 
American species. Am. Journ. Conch, ii. pp. 54-63, 136- 
143. 
Fully two-thirds of all the operculated land-shells are peculiar 
to islands, whilst more than one-half of the inoperculated are 
peculiar to continents. As regards America, twelve genera of 
