CONTENTS. V 



Page 

 drossan on the coast of Ayrshire. By William Thompson, Esq., Pres. 

 Nat. Hist, and Phil. Society of Belfast 157 



XVII. On the Pliocene Deposits of the Valley of the Thames at 

 Ilford. By Richard Payne Cotton, M.D 164 



XVIII. Additions to the Fauna of Ireland. By William Thomp- 

 son, Esq., Pres. Nat. Hist, and Phil. Society of Belfast 169 



XIX. On the Ventriculida of the Chalk. By J. Toulmin Smith, 

 Esq. (With two Plates.) 176 



Proceedings of the Zoological Society 192 — 208 



Note on the Hop-fly, by Francis Walker, Esq. ; On the Parasitical Na- 

 ture of the Rhinanthacecs, by J. Decaisne; On the situation of the 

 Olfactory Sense in the terrestrial tribe of the Gasteropodous Mol- 

 lusca, by Joseph Leidy, M.D. ; A new species of Procellaria from 

 Florida, by G. N. Lawrence ; Description of a new Lizard dis- 

 covered by Mr. Dyson in Venezuela, by J. E. Gray, Esq., F.R.S., 

 F.Z.S. ; Swarm of Ladybirds ; Description of a new species of 

 Anser, by George N. Lawrence ; Account of a Black and White 

 Mottled Swan, on the water in the demesne of the Earl of Shannon, 

 Castle Martyr, County Cork, by Maurice Glencon ; Meteorological 

 Observations and Table 209—216 



NUMBER CXXXIII. 



XX. Description of the Atlas, Axis, and Subvertebral Wedge Bones 

 in the Plesiosaurus, with remarks on the homologies of those bones. 



By Prof. Owen, F.R.S 217 



XXI. On the Fossil Botany and Zoology of the Rocks associated 

 with the Coal of Australia. By Frederick M'Coy, M.G.S. & 

 N.H.S.D. &c. (With nine Plates.) 226 



XXII. Additions to the Fauna of Ireland. By William Thompson, 

 Esq., Pres. Nat. Hist, and Phil. Society of Belfast 237 



XXIII. Descriptions of some species of Brachiopoda. By Mr. T. 

 Davidson, Mem. Geol. Soc. France, and Mr. J. Morris, F.G.S. (With 

 two Plates.) 250 



XXIV. Descriptions of new species of Butterflies. By William 



C Hewitson. (With two Plates.) 257 



XXV. Remarks on some Cetoniada, with the description of a new 

 Australian species. By Adam White, F.L.S., M.E.S. Stettin, and As- 

 sistant in the Zoological Department British Museum 264 



XXVI. The Classification of the British Mollusca. By W. E. Leach, 

 M.D 267 



Proceedings of the Royal Society ; Zoological Society 273—285 



Eggs of the Moa or Dinornis of New Zealand ; Fossil Tree ; Description 

 of a new species of Antelope from West Africa, by J. E. Gray, 



