VIU CONTENTS. 



Papers {continued) — page 



Descriptions of six new species of Marine Mollusca from the 



Collection of the late Admiral Keppel. By G. B. Sowerby, 



F.L.S. (Figs.) 174 



Note on Voluta Brazieri, Cox. By E. A. Smith, I.S.O. (Fig.). . 17« 

 On the Doris planata of Alder & Hancock. By Sir C. N. E. 



Eliot, K.C.M.G 1»0 



Description of a Helicoid land-shell {Xanthomelon BednalU) from 



Central Australia. By J. H. Ponsonby, F.Z.S. (Figs.) . . 182 

 Descriptions of three new species of Opisthostoma from Sarawak, 



North Borneo. By E. A. Smith, I.S.O. (Figs.) 189 



On a new variety of Planispira zebra, Pfr., from the Island of 



Gisser, and a new sj^ecies of Ghloritis from Java. By the 



Kev. R. A. BuLLEN, F.L.S., F.G.S. (Plate XI, colom-ed.) . . 191 

 On the Anatomy of certain species of Siliqua and Ensis. By 



H. H. Bloomer. (Plate XII.) 193 



On the genus Tomigerus, Spix, with descriptions of new species. 



By Dr. H. von Ihering. (Figs.) 197 



Notes on some New Zealand PleurotoraidBe. By H. Suter . . 200 



Notes on some species of Ghione from New Zealand. By H. Suter 202 

 Note on Mr. Suter's paper on species of Ghione from New Zealand. 



By E. A. Smith, I.S.O 206 



Description of a new species of Trachiopsis from British New 



Guinea. By H. B. Preston, F.Z.S. (Fig.) 207 



An arrangement of the American Cyclostomatidse, with a revision 



of the nomenclature. By Prof. W. H. Dall, D.Sc. (Figs.) 208 

 A review of the Genera of the family Mytilidse. By A. J. Jukes- 

 Browne, B.A., F.G.S 211 



Note on the type of Geomelania, Pfeifi'er, with the description of 



a new species. By E. R. Sykes, B.A. (Figs.) 225 



On three species of Dyakia from Western Sumatra. By E. R. 



Sykes, B.A. (Figs.) 227 



On some Nudibranchs from the Pacific, including a new genus, 



Ghromodoridella. By Sir C. N. E. Eliot, K.C.M.G 229 



Notes on two rare British Nudibranchs, Hero formosa, var. 



arborescens, and Staurodoris maculata. By Sir C. N. E. 



Eliot, K.C.M.G 239 



Description of a new species of Achatina from the Zambesi. By 



H. B. Preston, F.Z.S. (Fig.) 244 



Variation in Recent Mollusca. By E. R. Sykes, B.A 253 



On a Dibranchiate Cephalopod, StyracoteiUhis orientalis, n.gen. and 



n.sp., from the Eocene of Arabia. By G. C. Crick, F.G.S, 



(Figs.) 274 



Descriptions of seven new species of Marine Mollusca from the 



Collection of the late Admiral Keppel. By G. B. Sowerby, 



F.L.S. (Figs.) 279 



