LIST 



CONTRIBUTORS, 



With References to the several Articks contributed by each . 



Adams, Arthur, Esq., R.N., F.L.S. &c. page 



Catalogue of the Species of Emarginula, a Genus of 

 Gasteropodous MoUusca, belonging to the Family Fissurel- 



lidae, in the Collection of H. Cuming, Esq 82 



Catalogue of the Species oi Nassa, a Genus of Gasteropo- 

 dous MoUusca, belonging to the Family Buccinidae, in the 

 Collection of H. Cuming, Esq. ; with the Description of 



some New Species 94 



Descriptions of Fifty-two New Species of the Genus Mitra, 



from the Cumingian Collection 132 



Contributions towards a Monograph of the TrochidcB, a 



Family of Gasteropodous MoUusca 150 



A Monograph of Scutus, a Genus of Gasteropodous Mol- 



lusca, belonging to the Family Fissurellidas 221 



A Monograph of the Genus Monoptygma of Lea . . . 222 

 Descriptions of New Shells from the Cumingian CoUection 224 



Note on the Genus Nernatura 225 



A Monograph of the Recent Species of Rimula, a Genus 

 of MoUusca, belonging to the Family Fissurellidae .... 226 

 A Monograph of Piincturella, a Genus of Gasteropodous 



MoUusca, belonging to the Family Fissurellidae 227 



Descriptions of Sixteen New Species oi Rissoina, a Genus 

 of Marine Gasteropodous MoUusks, from the Cumingian 



Collection 264 



Descriptions of several New Species of Murex, Rissoina, 

 Planaxis, and Eulima, from the Cumingian Collection . . 267 



