IB 
HEPORT. 
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 Silver. 
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 of 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 
