X 



Page 

 Hudson, William H., C.M.&* 



Tenth Letter on the Ornithology of Buenos Ayres 4 



Eleventh Letter on the Ornithology of Buenos Ayres .... 258 



Twelfth Letter on the Ornithology of Buenos Ayres .... 326 



Kent, W. Saville, F.Z.S., of the Geological Department, 

 British Museum. 



On some new and little-known Species of Madrepores, or 

 Stony Corals, in the British-Museum Collection. (Plates 

 XXIII.-XXV.) 275 



On a new Genus of Sponges from North Australia. (Plate 

 XLVI1I.) 615 



Krefft, Gerard, C.M.Z.S. 



Letter from, containing notices of rare Australian Whales 

 of the Genera Dioplodon and Ziphius 630 



Macdonald, Professor. 



Exhibition of Specimens of the Cranial Bones of Fishes . . 547 



Mivart, St. George, F.R.S., F.Z.S., Lecturer on Compa- 

 rative Anatomy at St. Mary's Hospital. 



On Hemicentetes, a new Genus of Insectivora, with some 

 Additional Remarks on the Osteology of that Order. ( Plate V.) 58 



Moore, Frederic, Walker, Francis, and Smith, Fre- 

 derick. 



Descriptions of some new Insects collected by Dr. Anderson 

 during the Expedition to Yunan. (Plate XVIII.). ....... 244 



Murie, James, M.D., F.L.S., F.G.S., late Prosector to the 



Society. 



Additional Notice concerning the Powder-Downs of llhino- 

 chetusjubutus, &c 64 7 



