IV 



placed their collections at Mr. Busk's disposal, for the 

 purposes of this Catalogue, and for the selection of the 

 specimens required for the Museum Collection. 



The Catalogue has been prepared, and the drawings 

 made, by Mr. GEORGE BUSK, F.R.S., who has also super- 

 intended the execution of the lithography. The magnified 

 figures have in all cases been taken from nature, and for 

 the most part from specimens preserved in fluid, in order 

 to ensure a more natural aspect than that afforded by dried 

 specimens. As they have been drawn with the aid of the 

 camera hicida, and to a scale which is given with each plate 

 or figure, the absolute and relative proportions of the 

 different objects will be at once obvious. 



JOHN EDWARD GRAY. 



1 Dec. 1853. 



