Mitchell, D. W., Esq., B.A., F.L.S., Sec.Z.S. page 



Notice of a Hybrid Crowned-Pigeon, hatched in the 



Menagerie 170 



Notice of a Hybrid Bull 172 



MuRCHisoN, Sir R. I., G.C.St.S. 



Letter relating to the Aurochs 32 



Murray, Hon. C. A., H.M. Consul-General in Egypt. 



Letters relating to Collections made in Egypt . 33, 64, 106 

 Letter relating to a Hippopotamus presented to the So- 

 ciety by H.H. Abbas Pasha 163 



Parley, Major. 



Notice of the capture of Orthagoriscus Mola off the Chesil 

 Bank, Dorsetshire 6 



Pfeiffer, Dr. L. 



Descriptions of twenty-four New Species of Helicea, from 

 the Collection of H. Cuming, Esq 126 



Descriptions of twelve New Species of Vitrina and S%ic- 

 cinea, from the Collection of H. Cuming, Esq 132 



Descriptions of thirty New Species of Tornatellina, Cylin- 

 drella, and Clausilia, from the Collection of H. Cuming, Esq. 134 



Reeve, Lovell, Esq., F.L.S. 



Description of a New Species of Bulimus, from the Col- 

 lection of A. L. Gubba, Esq. of Havre 16 



Descriptions of sixteen New Species of Bulimus, in the 

 Collection of H. Cuming, Esq., discovered by Mr. W. Lobb 

 in the Andes of Peru 96 



Description of a New Species of Cytherea 126 



Shaw, A. N., Esq. 



Letters relating to Collections made at Bombay . . 33, 94 



SowERBY, G., Esq., F.L.S. &c. 



Description of a New Species of the Genus Tomigerus . 14 

 Description of two newly-discovered Species of Cyclostoma 1 5 



SowERBY, G. B., Jun., Esq., F.L.S. 



On a New Genus of PholadidcE, with notices of several 

 New Species, and of a remarkable specimen of Pholas Calva 

 in Mr. Cuming's Collection 160 



Stevenson, Mrs. 



Letter ^- 106 



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