ACCOUNTS, &C., OF THK BRITISH MUSEUM. 63 



Fossil Reptilia (Galleries 3, 4, and 5). — The naming, und to some extent t!ie arrange- 

 ment, of the Pterosauria, Crocodilia, and Dinosauria, occupying Table-cases 1 to 10, and 

 Wall-cases I. to VII., have undergone revision consequent upon the preparation of a 

 Catalogue of these orders of Reptilia. 



Wall-cases VHI., IX., ami X., at the west end of Gallery 4, have been entirely re- 

 arranged. Here are placed the remains of the great aquatic reptiles of the Mosasaurus 

 type met with in the Cretaceous formations of England, Holland, New Jersey, 

 N. America, and New Zealand ; the Dicynodontia, from the Triassic rocks of South 

 Africa; also those referred to the genus Pl/osaurus, from the Oxford and Kimmeridge 

 clavs of Lin<',oln, Cambridge, Wilts, and Dorset-shires. 



The contents of Wall-cases XI. and XII., and Table-cases 20. 21, and 22 (.West 

 Corridor), devoted to the order Chelonia, and to the class Amphibia, have been entirely 

 re-arranged, named, and labelled afresh. Here are placed the head-shields and tail-sheaths 

 of the remarkable Chelonian (Meiolania), originally described as " a great horned lizard, ' 

 from Queensland and Lord Howe's Island, Eastern Australia, by Sir Kichard Owen, 

 K.C.B., and the affinities of which have been recently discussed by Professor Huxley, 

 F.R.S., Mr. Boulenger, and others. 



Fussil Fishes (Gallery No. 6). — Three Table-cases (Nos, 45, 46, and 47), containing 

 the later Mesozoic Ganoids, have been arranged and labelled. 



The remarkably fine series of fishes from the Cretaceous formation of the Lebanon 

 (from Hakel and Sahel-el-Alma), lately described by Mr. J. W. Davis, have been 

 revised, named, mounted, and labelled for exhibition, as have also the London Ciay 

 Fishes. 



The four Wall-cases (Nos. 15 to 18, East Side) devoted to the fossil Teleostean Fishes, 

 have been carefully arranged and labelled. 



The whole of the fossil Elasmobranch fishes have undergone revision preparatory to 

 the publication of a Catalogue thereon. 



A large number of important additions to the fossil fishes have been made during the 

 past year. These have been named, labelled, and placed in the cases in their proper 

 fauiilies. 



The whole series of unexhibited " study-specimens," preserved in drawers beneath the 

 Table-cases, have been carefully examined and arranged conveniently for refererce. 



Invertebrata. 



MoUusca-Cepha/opoda {GaWerj No. 7). — Various specimens, as sections of shells, models 

 and drawings, illustrating the structure of the shells and animals of the Cephalopoda, 

 have been mounted and placed in the Table-case (No. 57) at the entrance to this 

 Gallery. 



The critical examination of the Belemnitidae has been completed ; 205 specimens have 

 been mounted upon 102 tablets, and the unmounted specimens placed in 21 drawers 

 beneath Table-case No. 59. 



The Silurian Cephalopoda have been removed from Wall-case No. 14., and in this 

 case have been arranged the Jurassic Belemnitidse. 



The Eocene and Chalk Nautili, which occupied Wall-case No. 3, have all been 

 named and mounted on blocks, and are being transferred to Wall-case No. 2. 



Printed labels have been prepared, and will be affixed to each block on which the 

 specimen is mounted. 



The Ammonitidae, which were arranged in Wall-case No. 8, have been replaced by 

 the Orfhoceratidse. 



Three hundred and forty-eight specimens of Orthoceras have been mounted on 220 • 

 tablets, and the unmounted specimens placed in 11 drawers beneath Tablc-ca&e No. 72. 



All the acquisitions to this group, whether by donation or purchase, have been duly 

 registered, named, and incorporated with the Collection. 



Many specimens have been developed and prepared for exhibition, and sections of 

 others have been made and polished to show the internal structure of the shell and its 

 siphuncle. 



(^Gallery No. 8.)— /»/oZZ«sca.— The specimens contained in six Table-case.s, devoted to- 

 the Gasteropoda and Lamellibranchiata of the Eocene, the Cretaceous, the Lias, Ehaetic, 

 and Permian, the Carboniferous, and Devonian, have all been mounted on tablet.^, or m 

 glass-tojmed boxes, each bearing in audition to the genus and species the author's name, 

 the name of the formation, and the locality from which the specimens were obtained, 

 and if presented, the name of the donor. Every type-specimen is marked by a small 

 disk of green paper attached to it, and upon the label is given a reference to the work in 

 which it has been figured and described. The mounted Gasteropoda number 3,387, and 

 tiie Lamellibranchiata 1,994 specimens. Those not exhibited in the Table-cases are 

 placed in regular order in the drawers of the C.ibinets beneath. 



Three thousand one hundred and sixty-five specimens of Jurassic, Cretaceous, and 



Tertiary Brachiojwda have been mounted on tablets, named, and localised as in the case 



of the rest of the MoUusca already referred to. ^ , . , 



H ^ Echmodermata. 



