PREFACE. Vll 



Mr. Rupert Jones since the publication of the work. For 

 many valuable extracts on the habits of the Crustacea, I 

 am indebted to the various papers and works of Colonel 

 Montagu and Messrs. Gosse, Couch, Kingsley, Goodsir, and 

 others. The plates have been drawn by Mr. G. B. Sowerby, 

 F.L.S., chiefly from specimens in the cabinets of the British 

 Museum. The figures of Entomostraca have been for the 

 most part selected with Dr. Baird's kind permission from 

 his volume on the subject. Tor the drawings of all the 

 figures in Plate X., as well as for the original figure of 

 Pettidium, I am indebted to the kindness of Mr. Spence 

 Bate. For various valuable notes on habitats of the many 

 rare British Crustacea dredged by the Rev. Alfred Norman, 

 and for a few curious notices of the Guernsey Crustacea, I 

 am indebted to the Eev. Alfred Norman and Dr. Lukis. 



A. W. 



June, 1857. 



