BRITISH MirSEUM (NATURAL HISTORY). 103 



and another new species, G. gilchristi, obtained in the Cape 

 Seas, and the specimen of C. dodecalophus dredged by the 

 " Challenger," have been mounted in special exhibition jars, 

 and after being shown for a time in the Entrance Hall have 

 been placed on exhibition in the Shell Gallery. 



The series of Crabs showing the extent to which the 

 external appearance, particularly those characters known as 

 secondary sexual characters, may become altered, in con- 

 sequence of the animal being attacked by the parasite 

 Sacculina, has been removed from the eastern side of the 

 Entrance Hall to the Arthropod Gallery. 



Two new cases have been constructed for Bay 6 in the 

 Hall, and these are set up obliquely so as to secure the best 

 possible illumination. They are intended for the series of 

 Peas and Maize illustrating the Mendelian hypothesis of 

 inheritance, and for a similar series of cross-bred Mice which 

 is in progress, but not yet complete. Advantage has been 

 taken of the incompleteness of this last series to use one of 

 the cases for the temporary display of a series of Eolithic 

 flint implements presented by Dr. H. P. Blackmore, and, for 

 comparison with these, a selection of Eolithic and Palseolithic 

 implements from the Prestwich Collection. 



Much has been done in re-spiriting and remounting such 

 of the anatomical preparations in the Entrance Hall as were 

 in need of attention. 



A series of twenty-two wax models illustrating the early 

 development of the mollusc Grepidula, presented by the 

 American Museum of Natural History, has been placed 

 on exhibition in a cabinet case in the North Hall. 



Experiments have been made to ascertain the best method 

 of storing large skeletons, not required for exhibition, in such 

 a manner that they may occupy the least possible space and 

 yet be freely accessible for purposes of study, and a skeleton 

 of Giraffe has been dismounted and stored in a specially con- 

 structed cabinet, to serve as a pattern. 



E. Maunde Thompson, 

 Director and Principal Librarian 

 British Museum (Natural History), 

 22 February 1908. 



