132 accounts, etc., of the beitish museum. 



Index Museum and Morphological Collections. 



All the dissections exhibited in the Hall have been examined 

 during the course of the year ; 23 preparations of parts of 

 vertebrate animals and 23 preparations of Mollusca have been 

 re-mounted in alcohol. 



In the Tropical Diseases section of the Ghent Exhibition, 

 which was open from May to November 1913, were shown 

 specimens and enlarged models of mosquitoes, tsetse-flies, house- 

 flies, fleas, &c., to illustrate the methods adopted at the British 

 Museum (Natural History") for explaining the manner in which 

 insect-borne diseases are disseminated, and the measures to be 

 recommended for checking the spread of such diseases. The 

 preparation of these exhibits was controlled partly in the 

 Index Museum and partly in the Zoological Department. 



The series of Animals and Minerals that are mentioned in 

 the Bible, placed on exhibition, in June 1911, as a supplement 

 to the Biblical Exhibition at the British Museum (Bloomsbury) 

 on the occasion of the tercentenary of the issue of the Autho- 

 rised Version, was dispersed in March 1913 ; the series of Bible 

 Plants, however, still remain on view in the Central Hall, and 

 and that of Bible Minerals in the Mineral Gallery. 



A series of specimens illustrating modifications of structure 

 of animals in relation to flight has been prepared and set out in 

 Bay VII. in the Hall. The exhibition was opened to the public 

 on August loth, 1913. The series comprises 166 mounted 

 objects and 12 microscopic specimens, and explains in a popular 

 manner the adaptation of each kind of flying animal for aerial 

 locomotion, and indicates the changes that must have taken 

 place in the structure of the body before the animal could fly. 

 The exhibition is not limited to animals that can truly fly by a 

 beating of wings, i.e., birds, bats, pterodactyles, and insects, 

 but includes also examples of animals which move through the 

 air by scudding or gliding, such as the so-called flying squirrels 

 and flying phalangers. An illustrated guide-book of 80 pages 

 has been issued in explanation of the series. 



Of interest in connection with the damage done by certain 

 moths and beetles to biscuits supplied for army service, a series 

 of injured biscuits and the insects causing the damage was 

 exhibited in the Hall from August 15th to November 13th, 

 1913, together with the apparatus employed by Mr. J. Hartley 

 Durrant and Lieut. -Colonel W. W. 0. Beveridge in their investi- 

 gations to determine, firstly, the temperature of the interior of 

 biscuits at the successive stages of baking ; and, secondly, the 

 possibility of the eggs of moths and beetles surviving these 

 temperatures. 



A selection of the specimens collected on the British Antarctic 

 (•' Terra Nova "; Expedition, ]910, was placed on exhibition in 

 the Hall on November 25th, 1913. The specimens displayed 

 comprise marine animals obtained in the Antarctic seas, off 



