viii CONTENTS. 



On the Deposits containing Carnivora and other Mammalia 

 in the Valley of the Thames - - - - 539 



Muller, J. (Professor). 



On the generic characters of Cartilaginous Fishes - 33, 88 

 Newman, Edward, F.L.S. 



On the British species of Polypodium - 141 



Remarks on the Antenna: of Insects, in relation to their sup- 

 posed Auditory Functions - 26S 

 Descriptions of new species of Popillia - - 336, 392 

 Descriptive list of the species of Rhysodes - 663 

 Ogilby, W., M.A., F.R.A.S. &c. 



Observations on " Rules for Nomenclature" - - - 150 



Further Observations on " Rules for Nomenclature." - 275 



Letter in reference to Mr. Strickland's Observations on the ap- 

 plication of the term Simla - - - 492 

 Owen, R. (Professor.) 



Letter to M. Arago - - - - - - 94 



A Reply to the Communication addressed by M. Coste to the 

 French Academy of Sciences, entitled ' Memoire en Reponse 

 a la Lettre de M. R. Owen : — in a Letter addressed to M. 

 Arago, Perpetual Secretary to the Academy - - 183 



On the camerated structure of the Shell of the Water-Clam, 

 (Spondylus varius) ------ 407 



Power, Madame Jeannette. 



Experiments made with a view of ascertaining how far certain 

 marine testaceous animals possess the power of renewing 

 parts which may have been removed - - - 63 



Rees, G. 0., M.D. 



Notice respecting the proportion of siliceous matter in Chalk 676 

 Roos, Georgina. 



Translation of Meteoric Observations, from a German Paper - 120 

 Shuckard, W. E., V.P.E.S. &c. 



Description of a new species of Myrmica - 626 



Skaife, John. 



Miscellaneous Ornithological Notes - - - - 331 



On the Ornithology of Blackburn and the North of Lanca- 

 shire, 426, 524 



Smith, Andrew, M.D. 



Contributions to South African Zoology - - 30, 92 



Sowerby, G. B., F.L.S. 



Description of a new genus of Trochidea - - -96 



On the true locality for Brookite - 293 



Comparison of Cyrena, Valvata, and Unio found fossil at Grays, 

 with recent species - - - - - -546 



Strickland, H. E., F.G.S. 



Substitution of a new generic name, Thetis, for the second ge- 

 nus of Proteus, in the class Infusoria - - - 53 

 Remarks on 'Viator's' proposed new name for the infusorian 

 genus, Proteus - - - - - -165 



Reply to Mr. Ogilby's 'Observations on Zoological Nomencla- 

 ture' - - - - - - - 198 



Remarks on. Mr. Ogilby's 'Further Observations on Rules for 

 Nomenclature' ------ 326 



On the Naturalization of Dreissena polymorpha in Great Bri- 

 tain - - 361 



A few words of explanation in reference to Mr. Ogilby's Letter 555 



