XVI 



to a re-arrangement, which, however, will be certain to require 

 modifications when the groups are considered in detail. 



The final arrangement of each sub-group is taxonomic, 

 commencing with the lowest plant showing the structure, and 

 ending with man. When chemical composition and development 

 arc illustrated, they precede the mature structure. An oval 

 label bearing the Catalogue number characterizes this Series. 

 A capital letter indicates the group. Additions are distinguished 

 by a small letter. When this is placed in front of the number 

 it means that the specimen should be placed in front of the one 

 that bears the number alone, the reverse being the case if the 

 letter follows the number. As in other departments, black 

 figures indicate that the specimen is Hunterian. After many of 

 the descriptions of the specimens references are given, which 

 are selected as being most useful, and in them w r ill often be 

 found the titles of previous papers on the subject. 



In carrying out this work I am greatly indebted to the kind 

 assistance of many friends who have most liberally placed at my 

 disposal valuable material that has enabled me to supply many 

 deficiencies ; their names are duly mentioned in the Catalogue. 

 More especially do I wish to thank Profs. G. B. Howes, J. B. 

 Farmer, and F. G. Parsons for much valuable aid and advice. 

 The admirable preparations made by Mr. R. H. Burue have 

 enabled me to exhibit preparations of structures of great 

 delicacy and interest, that, as they are prepared by the best 

 modern methods, are likely to be permanent. Mr. W. Pearson's 

 dissections of Vertebrata leave nothing to be desired in the 

 clearness and beauty with which they are displayed. I have 

 also to thank Mr. J. Green, of Mintern Bros., for the excellent 

 manner in which he has reproduced my drawings. It is hoped 

 that they may help to render the Catalogue useful to many, 

 independently of the Museum. 



C. STEWART, 



Conservator, 

 25 June, 1900, 



