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PouLTON, Edward B., M.A., F.R.S., Hope Professor of Zoology iu 

 the University of Oxford. 



Natural Selection the Cause of Mimetic Resemblance and 

 Common Warning Colours. (Plates 40-44) 558-612 



PiDEWoOD, W. G., B.Sc, F.L.S., F.Z.S., Lecturer on Biology at 

 St. Mary's Hospital Medical School, London. 



On the Structure and Development of the Hyohranchial Skeleton 

 and Larynx in Xenapus and Fipa ; with Remarks on the 



Affinities of the Aglossa. (Plates 8-11) 53-128 



On the Larval Hyobranchial Skeleton of the Anurous Batra- 

 chians, with Special Reference to the Axial Parts. (Plate 

 31) 474-487 



Walker, Alfred 0., F.L.S. 



On some new Species of Edriophthalma from the Irish Seas. 

 (Plates 17 & 18) 226-2.32 



Waters, Arthur 'VS'illiam, F.L.S. 



iSfotes on Bryozoa ft'om Rapallo and other Mediterranean 



Localities — chiefly Cellulariidfe. (Plates 1 & 2) 1-21 



Observations on Membraniporidce. (Plates 47-49) .... 654-693 



Watson, Rev. Robert Boog, LL.D., F.R.S.E., F.L.S. 



On the Marine MoUusca of Madeira ; with Descriptions of 

 Thirty-five new Species, and an Index-List of all the known 

 Sea-dwelling Species of that Island. (Plates 19 & 20) . 233-829 



West, G. S., A.R.C.S.Lond,, Scholar of St. John's Coll., Cambridge. 



On the Histology of the Salivary, Buccal, and Harderian Glands 



of the ColvbridcB, with Notes on their Tooth-succession and 



the Relationships of the Poison-duct. (Communicated by 



Prof. G. B. Howes, F.R.S., Sec.L.S.) (Plates 34 & 35.) 517-526 



