VI 
PREFACE. 
work has stimulated the exertions of naturalists, so that 
species of the group, previously unknown, are added almost 
every year to our Fauna. Dr. Kinahan has described, only 
a month ago, a fine distinct new species of Crangon , dredged 
in the Irish Sea, where Professors Allman and Melville and 
the late Mr. Thompson of Belfast were so successful. The 
researches of Mr. Spence Bate and his correspondents have 
quadrupled the list of Amphipods, while naturalists eagerly 
expect the fine work on these Crustacea and their allies, 
which he and Mr. Westwood are preparing to publish in 
the same form as that of Professor Bell. 
In the following popular history of British Crustacea, the 
general arrangement is that of the classical ‘Histoire Na- 
turelle des Crustaces,' by Professor Milne-Edwards. Among 
the AmpMpoda, I have been chiefly guided by Mr. Spence 
Bate's synopsis, published in the Eebruary number of the 
* Annals and Magazine of Natural History.' In the Ento- 
mostracous portion, I have compiled almost exclusively 
from Dr. Baird's valuable volume, published by the Bay 
Society, adding a few species discovered by Dr. Baird and 
