DEPARTMENT OF GEOLOGY. 135 



The type specimen of Iguanodon hoggi, Owen, a small jaw 

 from the Purbeck Beds of Swanage, presented by Alexander 

 J. Hogg, Esq., has been mounted and placed in wall-case 6. 



The greater part of the hind limb of a gigantic herbivorous 

 Dinosaur (Brontosaurus excelsus, Marsh), from the Jurassic 

 of Wyoming, U.S.A., and a plaster cast of the hind limb of a 

 large carnivorous Dinosaur (A llosaur us fragilis, Marsh), from 

 the same formation and locality, have been mounted on stands 

 in the middle of the Gallery. These specimens were obtained 

 by exchange with the American Museum of Natural History, 

 New York. 



The glazing of the framed specimens of Plesiosauria has 

 been completed. 



Plaster-casts of the type-specimens of the remarkable extinct 

 Patagonian horned tortoise (Miolania argentina, Ameghino), 

 liave been mounted in wall-case 11. 



A slab of Chalk from Kansas, containing a fine head and 

 anterior portion of the skeleton of a Mosasaurian (Platecarpus 

 coryphceus, Cope), has been framed and fixed, with an explana- 

 tory diagram, in wall-case 7. This specimen was obtained 

 from the collection of Mr. Charles H. Sternberg, who 

 ■discovered the small skull of Clidastes in the same case. 



The Ophidia, D. 'ichosauria, Lacertilia, and a selection of 

 Coprolites and Footprints of extinct reptiles, have been re- 

 arranged in three table-cases in the middle of the Gallery. 



Number of specimens of Reptilia and Amphibia registered, 67. 



Pisces (Gallery 6). — Wall-case No. 4 has been re-arranged 

 and refitted to contain the William Clark Collection of 

 armour-plated fishes (Arthrodira) from the Upper Devonian of 

 Ohio, U.S.A. The large slabs, prepared last year, have now 

 been framed and completed for exhibition. 



The Ostracodermi displaced by this re-arrangement have 

 been temporarily placed in a glazed case in the middle of the 

 Gallery. 



A series of Upper Silurian fishes from Lanarkshire, pre- 

 sented by the Director of the Geological Survey, has been 

 registered and incorporated in the Collection. 



A fine slab of sandstone from the Lower Mesozoic Stormberg 

 Beds of Orange Colony, South Africa, covered with examples 

 of the ganoid fish Semionot'ihs capensis, A. S. Woodw., has 

 been placed in wall-case 9. 



The other smaller acquisitions during the year have also 

 been registered and incorporated in the collection. 



Number of specimens of Pisces registered, 238. 



MoUusca : Cephclopoda (Gallery 7). — The re-labelling of 

 the exhibited Cephalopoda, with printed labels, has proceeded, 

 and in connection with this ^vork 872 specimens have been 



