110 Anniversary Address to the 
The Crustacea are now 291; in 1843 they were 159. This 
is an enormous advance, and curious, since in great part it 
has arisen from additions to the list of paleozoic species. It 
marks, moreover, not merely an advance of names, but one of 
knowledge, as may be judged from an inspection of the 
changes in the generic list. The Trilobites have undergone 
a complete revision, and the number of species of those sin- 
gular animals is vastly increased, thanks more especially to 
the work done by Salter and by M‘Coy. The Cytheride and 
Cypridide have become a feature in the catalogue, mainly in 
consequence of the researches of Rupert Jones. Professor 
M‘Coy has largely added also to the list of these tribes, and 
to the catalogue of the higher crustacea from our mesozoic 
and lower tertiary strata. 
The additions to the list of fossil insects more than double 
this portion of the catalogue. They are due to the Rev. P. 
Brodie, and are entirely derived from mesozoic strata, chiefly 
from the Purbecks and Lias. In this department there is a 
considerable amount of unpublished materials existing in 
collections. 
The number of Brachiopoda has swollen from 459 to 668, 
an addition of more than 200 species! In the mean time they 
have been undergoing complete and thorough revision. Mr 
- Davidson, whose appearance among us as a British paleon- 
tologist has taken place in the interval between the two edi- 
tions, is foremost among the workers in this department, one 
greatly increased also by the labours of King, M‘Coy, and 
Salter. Some very interesting contributions have come from 
Mr D. Sharpe, and Mr C. Moore of Ilminster. The impor- 
tant discovery of Liassic species of Leptena and Thecidium 
in Britain is due to the last-named observer. 
The catalogue included 318 Monomyarian Bivalves in 1843; 
in the new edition 577 are recorded. The additions in this 
instance come from numerous sources. Both in this and the 
following group we owe much to the labours of Mr Morris 
and Mr Lycett among the Oolites. 
The appearance of the first part of the “ Description of 
the Fossil remains of Mollusca found in the Chalk of Eng- 
land,” by our valued treasurer, Mr Daniel Sharpe, will be— 
