Quarterly Journal of Conchology. 163 



Arctic Ocean, of the Baltic, and of the North Sea. 



2. The Western or Atlantic Region — Portugal, Western Spain, West- 



ern France, Cornwall, Wales, W. Ireland. 



3. The Southern or Mediterranean region — consisting of the basin 



of that sea. 



4. The Central or Pontic region — the basin of the Black Sea 



and of the Sea of Azoff. 



5. The Eastern or Caspian Region — The basin of the Caspian. 



It would lead us too far here to discuss this paper as fully as it 

 deserves. Suffice it to say that even those who do not agree with 

 all its conclusions, will find a mine of valuable information on the 

 geograpliical distribution of the Palcearctic moUusca. 



MoRELET, A. — Sur quelques coquilles inedites on imparfaite 

 ment connues des ties orientales de 1' Afrique ( Some new or imper- 

 fectly known shells from the Eastern African Islands). — pp. 85 — 91. 



The following new species are described : — 



Cydostoma Dupoiitianuin, (PI. Ill, fig. i ), Madagascar; C. 

 de/loratum, (PI. Ill, fig. 3), Bourbon ( Reunion), subfossil ; Pla- 

 norbis Mauritiaiius, ( PI. Ill, fig. 7 ), Mauritius. The opercula of 

 several species are described. Those of C. Philippianum, Pfeiffer, 

 and C. Coquandianum, Petit, prove those species to belong to 

 Otopoma. Cydostoma dtrinum, Sowerby, thought by Dr. Pfeiffer 

 to be from Trinidad, is really from Madagascar. 



Fischer, Dr. P. — Description d'un Nudibranche inedit, pro- 

 venant de la Nouvelle Caledonie, avec le catalogue des especes du 

 genre Ceratosoma (Description of a N. Caledonian Nudibranch, and 

 catalogue of the genus Ceratosoma). — pp. 91 — 94. 



C Caledonicu?n, Fischer. 



Fischer, Dr. P. — Note sur les Helix Buvinierl, Michaud, et 

 Asturicay Pfeiffer. ( Note on H. Buvinieri and Asturica). 



Michaud's name Buvinieri applies to the same species as Pfeiffer's 

 Asturica and being earlier must take priority. 



