18 &EPOBT. 



is still wanting, as well as of those from South America and 

 Siberia. The Collection would be greatly improved by 

 donations of the metallic ores; not being at present rich in 

 any of these, and poor in the ores of Manganese, Titanium, 

 Cobalt, and Sjlver. 



Many contributions are lost to Museums, because it is not 

 known what are the Desiderata to be supplied. It may be 

 useful, therefore, to point out, in other parts also of the 

 Collection, what the Society wants, as well as what it has 

 received. 



The Geological Catalogues contain the history of upwards 

 of eight thousand specimens, by which most of the British 

 Strata are illustrated ; but additional fossils are much to 

 be desired from the tertiary strata of Norfolk and Suffolk, 

 of Hampshire and the Isle of Wight, and from the Oolite, 

 Lias, and Mountain Limestone of Bath and Bristol. In the 

 Yorkshire series, the fossils most needed are from the Lias 

 of Whitby, and the Mountain Limestone of Craven. In the 

 organized fossils of foreign countries, and in those of Scotland 

 and Ireland, the collection is almost entirely defective. 



The most important desiderata in Zoology are, among the 

 Zoophytic Animals, the Flexible Corallines of the Medi- 

 terranean and Tropical waters; and very few specimens x)f the 

 Radiated, Vermiform, or Crustaceous classes yet belong to 

 the Museum. Of Foreign Shells its drawers contain but 

 350 species, and of British not more than 160. The attention 

 of Naturalists has been little turned to the two classes which 



