VIU CONTENTS. 



Page 

 XLIX. On the Caleispongics, their Position in the Animal King- 

 dom, and their Relation to the Theory of Descendence. By Pro- 

 fessor Ernst IIackel 421 



L. Observations on Pigs (Sm, Linnaeus ; Seiifera, Illiger) and 

 their Skulls, with the Description of a new Species. By Dr. J, E. 

 Gray, F.R.S. &c 431 



LI. Note on the Appearance in Australia of the Danais Archippus. 

 By Frederick M'Coy, Professor of Natural Science in the Mel- 

 bourne University, and Director of the National Museum of Victoria, 

 &c 440 



LII. Descriptions of new Species of Fossorial Hymenoptera in the 

 Collection of the British Museum. By Frederick SanxH, Assistant 

 in the Zoological Department, British Museum 441 



LIII. Observations on M. Favre's Paper on a New^Classification 

 of Ammonites. By Dr. J. E. Gray, F.R.S. &c ". 451 



Proceedings of the Royal Society 454 



Habits of Xenurus unicinctus, or Cabassou, by Dr. J. E. Gray, F.R.S,, 

 F.Z.S., &c. ; On the Fauna of Nowaja-Semlja, by Prof. Ehlers ; 

 On «Le Rat de Madagascar," by Dr. J. E. Gray, F.R.S. &c. ; 

 Note on the Anatomy of Comatula rosacea, by E. Perrier ; On 

 Mammalia from the Neighbourhood of Concordia, in New 

 Granada, by Dr. J. E. Gray, F.R.S. &c. ; Additional Note on 

 Tolypeutes connrus, by Dr. J. E. Gray, F.R.S. &c. ; On the Re- 

 spiration of the Psammodromi, by M. J. Jullien ; M. Gervais on 

 the Skeleton of the Lutli {Sjihargis coriacea) ; On an adult 

 Skeleton of Tyrse nilotica in the British Museum, by Dr. J. E, 

 Gray, F.R.S. &c. ; Biyozoa of Florida ; The late Robert 

 M'Andrew, Esq., F.R.S 463—471 



Index 472 



PLATES IN VOL. XI. 

 Plate I. Alteration of Shell-substance by Hydractinia. 

 II. Spatulemys Lasalae. 

 m. New Gonyleptidse. 

 IV.l 



V. > Development of the Sternum of Chelonians. 

 VI.j 



VILi 



j^ \ New British Fungi. 

 X."j 

 XI. Oeratorhinus niger. 



