104 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



during metamorphosis and direct development ; and of par- 

 ticulur interest is a collection of models of eggs of the Fowl, 

 broken open to show the progress made each day by the 

 developing Chick. 



No important additions have been made to the Morpho- 

 logical Series in the cases around the Hall, but in the centre 

 of the Hall has been placed a new case, the contents of which 

 explain the aetiology of the disease communicated to domes- 

 ticated animals by the Tsetse Fly. A similar set of prepara- 

 tions illustrating the life-history of Malaria-parasites, and 

 the relation of these to the A7i02')heles Mosquito, was com- 

 menced in the early part of the year, and is in an advanced 

 condition. 



Further than this, much experimental work has been 

 undertaken with a view to ascertaining the best means of 

 retaining and restoring the natural form and coloration of 

 Fishes, and the results arrived at will shortly be made use 

 of when the re-arrangement of the specimens of Fishes 

 exhibited in the public galleries is undertaken. 



General Library. 



The additions to the General Library during the past year 

 have been : — 



By purchase - - - 328 volumes. 



By donation - - - 372 volumes, 338 maps, and 



105 photographs. 

 By transfer from other 



Departments - - 14 volumes. 



Total - - 714 volume?, 338 maps, and 

 105 photographs. 



All the volumes and maps have been catalogued, press- 

 marked, and put in their places, whilst 392 volumes have 

 been bound in 249, and 15 volumes have been repaired. 



The extent of this collection on the 31st December was 

 29,204 volumes, 4,605 maps, and 105 photographs (not 

 including those in the Owen Collection of Dravvings, &c.). 



The accessions to the Departmental Libraries have also been 

 catalogued as they came in, and duplicate transcripts of the 

 titles have been returned with the books. 



Altogether 1,500 title-slips have been written, 103 re- 

 written, and 1,690 revised. 



There are now, on a rough estimate, 75,202 volumes 

 (exclusive of minor separata) and 5,780 maps in the whole 

 building. 



