iv PREFACE. 



connexion with their occurrence ; but 1 should deem myself wanting 

 in gratitude did I not especially record my sense of the kindness I 

 have received from Professor Milne-Edwards, who not only permitted 

 me the most ample opportunity of examining the typical specimens 

 in the Jardin des Plantes, but also entrusted me with a numerous 

 collection of unexamined Amphipoda for description. My thanks are 

 also due to M. Guerin-Meneville and M. Lucas for permission to 

 examine their private collections of Crustacea ; to Mr. Stimpson for 

 a valuable collection of Crustacea from North America and the 

 Japanese Seas ; and to Professor Liljeborg and Dr. Bruzelius for 

 copies of their works and valuable information. 



" The Council of the College of Surgeons kindly allowed me to 

 borrow from their store any specimen that I desired ; and a 

 collection of Arctic specimens was kindly lent to me by Mr. Hancock 

 of Newcastle. 



" In the Plates, the original figures taken from the animals are 

 shaded, whilst those taken from other authors are given in outline 

 only." 



J. E. GKAY. 



British Museum, 

 Dec. 1862. 



