116 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



About 2,800 Gasteropoda, from the Paris Basin, have 

 been named, mounted, and arranged in Wall-cases Nos. 3 

 and 4 (Gallery No. 8). 



A most valuable collection of British Post-Pliocene (non- 

 marine) Mollusca have been mounted in glass-topped boxes, 

 with printed labels to each, and arranged in a special table- 

 case in the centre, and near the entrance of Gallery No. 8. 

 The specimens have been grouped geographically, each locality 

 being indicated by a printed label. 



There have been registered during the past year Gastero- 

 poda, 3,501 ; Lamellibranchiata, 2,951. 



Molluscoida (Brachiopoda and Polyzoa).— The Brachiopoda 

 from the Cambrian, Ordovician, and Silurian rocks of Europe 

 have now all been labelled and arranged. Those from the 

 corresponding rocks of America and elsewhere have been 

 sorted out and in part labelled. 



Six hundred and fifty-one specimens of Foreign Palaeozoic 

 Brachiopoda have been mounted upon tablets, named and re- 

 gistered and placed in Wall-case, No. 11. Illustrative diagrams 

 and enlarged drawings have also been prepared and added to 

 this case. A slip catalogue of the Foreign Brachiopoda has 

 been commenced, and 947 slips have been written out. 



Detailed work on the "Davidson Collection" of Brachiopoda 

 has been commenced ; 1,608 specimens have been registered, 

 mounted, and arranged, in Gallery No. 11, Table-case No. 13. The 

 recent and fossil forms are being grouped together generically, 

 but, to render the former more distinct from the latter, speci- 

 ally prepared printed labels are affixed to all the living species. 

 A slip catalogue of this collection is in course of preparation. 



Polyzoa. — The British Polyzoa occupy Table-case No. 84, in 

 Gallery No. 8. The Pliocene, Eocene, and Cretaceous species 

 have been mounted in glass-topped boxes, with printed labels 

 to each, and enlarged drawings to illustrate the structure 

 of the polyzoarium and the zomcia accompany the speci- 

 mens. 



The total number of Brachiopoda and of Polyzoa registered 

 during the year amounts to 2,632 specimens. 



Crustacea (Gallery No. 8, Wall-case No. 13, Table-cases Nos. 

 80-83.) — Considerable progress has been made in preparing, 

 mounting, and labelling both the Foreign and British Collec- 

 tions of Fossil Crustacea. The British Eocene, Cretaceous, 

 Oolitic, and Liassic Decapoda are all mounted and arranged 

 in the table-cases, and the fine series of Solenhofen Crustacea 

 (mostly from the " Haberlein Collection ") in the adjoining 

 Wall-case No. 13. The Merostomata {Slimonia, Pterygotus, 

 Eurypteru^, &c.) are partly arranged in Table-case No. 81 

 and the larger specimens in Wall-cases Nos. 13 and 14. 



Part of the Trilohita from Dudley (Wenlock Limestone) are 

 mounted upon tablets and placed in Table-case No. 80. 



The 



