— 450 — 



As Especies de AmpuUaria da Republica Argentina, 



pe\o Dr H. von Ihering (IS9S) 425 



Ulteriori osservaziooi sui Molluschi terrestri dei din- 

 torni di Napoli, par le Dr R. Bellini (1899). . . 426 



Notes on the MoUusca of the Arabian Sea, Persian 

 Gulf, and Gulf of Oman, mostly dredged by Mr. 

 F. W. Townsend, with Descriptions of twenty- 

 seven species, by James-Cosmo Metvill (1899) . . 427 



A contribution towards a check-list of the non- 

 marine molluscan Fauna of South Africa, by 

 J.-Cosnw MelviUadd J.-H. Ponsonby {{8dS). . . 429 



Descriptions of a uew variety and five new species 

 of New Zealand land Mollusca, by Henry Suter 

 (1899). . • 429 



Die Opisthobranchier der Sammlung Plate, von R. 

 Bergh (1898) 430 



The distribution of the Unionidas in Michigan, by 



- Bryant Walker (1898) 432 



Verzeichniss der MoUusken Zurichs und Umgebung, 



\on Henry Suter (1898) 433 



Note on the Anatomy of Resania, Gray and Zenatia, 

 Gray, by W. H. Dali (1898) 434 



On the genus Halia Risso, by W. H. Dali (1898) . . 434 



Armature of Helicoid Landshells and new forms of 

 Plectopylis, by G. /î:. Gii<ie (1899) 435 



A. Study of the Family Pectinidae, with a Revision 

 of the Gênera and Subgenera, by A. E. Verrill 

 (1897) 435 



(*) Revision of the marine Gastropods referred to 

 Cyclostrema , Adeorbis , Vitrinella and related 

 Gênera ; with description of some new Gênera and 

 species belonging to the Atlantic Fauna of A.mQ- 

 vicà.hy Katharine J. Bush ({891) 437 



