. BRITISH MUSEUM (NATURAL HISTORY). . 101 



'All the volumes and maps have been catalogued, press- 

 marked, and put in their places, while 1,124 volumes have 

 been bound in 493, and 6 have been repaired. 



The extent of the collection on the 31st of December was 

 58,059 volumes, 5,671 maps,, and 459 photographs (not including 

 those in the Owen Collection of Drawings, &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 1,989 title-slips have been written, 147 re- 

 written, and 2,789 revised. 



There are now, on a rough estimate, 85,076 volumes (ex- 

 clusive of continuations and minor separata) and 5,972 maps 

 in the whole building. 



The printing of the Catalogue was proceeded with and the 

 work at the end of the year stood as follows : — 



No. of sheets passed for press (A — Meyn) - 163 



No. of title slips set up in type (A — Mez) - 37,616 



The identification of the Drawings in the Owen Collection 

 has been proceeded with by Mr. Harold Wilson. 



The number of visits paid to the Library during the year 

 by students and others (irrespective of the staff and persons to 

 whom the use of a key is granted) was 2,108. 



Index Museum and Morphological Collections. 



All the dissections exhibited in the Entrance Hall have been 

 examined during the course of the year ; 119 glass vessels 

 have been refilled with alcohol, 31 have been resealed, and 

 17 dissections have been remounted. 



The specimens of Insectivora and Chiroptera in the South 

 wall-case of Bay II. have been rearranged, and the twelve 

 preparations in Bay III. illustrating the structure of the foot 

 in Birds have been remounted. 



In Bay VI. the series of Peas illustrating Mendel's hypothesis 

 of inheritance have been relabelled. Of additions to the 

 Heredity series the following are the most notable : — Fifteen 

 skins illustrating the view of Mr. R. I. Pocock that Domestic 

 Cats are descended from two difiTerent species of Wild Cat ; a 

 series of twenty-one Mice, bred by Mr. A. D. Darbishire to 

 illustrate Mendelian segregation ; and ten Guinea-pigs bred by 

 Mr. C. J. Davies for the same purpose. 



In the " Fisheries Investigations " table-case two additions 

 have been made to the series of specimens showing the rate of 

 growth of the Eel ; three preparations have been added showing 

 the more rapid growth of Plaice on the Dogger Bank than on 

 the coast ; and two preparations illustrating the food of the 

 Herring have been introduced into the fish-food series. 



