ii THE VOYAGE OF H.M.S. CHALLENGER. 



merit a fuller illustration than I have been able to give them, but it is hoped that in all 

 cases the figures will be at least sufficient for their identification. 



To Mr. John Murray I would express my thanks for the kindness and consideration 

 he has invariably shown me during the progress of the work. I am indebted to him for 

 the opportunity of paying visits, in the early part of 1885, to the British Museum and 

 the Museum of the Jardin des Plantes in Paris, without which the identification of many 

 of the species would have been impossible. I have to thank my friend Mr. Hoyle, of the 

 Challenger Ofiice, for looking up many of the references which I had no opportunity of 

 oonsultingf in Madras. 



I am also under deep obligation to Professor A. Milne-Edwards and Mr. E. J. Miers 

 (late of the British Museum stafi') for the kind manner in which they placed the collec- 

 tions under their charge at my disposal, no less than for the time which they spent in 

 rendering me assistance. The former naturalist, in addition, allowed me to examine the 

 Anomura taken by the " Blake," as well as the as yet undescribed species from the recent 

 French deep-sea expeditions. My thanks are also due to my friend the Eev. Canon 

 Norman, for afibrding me the privilege of examining his unrivalled collection of North 

 ■ Atlantic Crustacea, and for other assistance ; to the Eev. R. Boog Watson for identifying 

 the Gastropod shells in which many of the Pagurids occurred ; and to my friend Mr. 

 Edgar Thurston for allowing me at all times free access to the scientific library and 

 collections under his charge in the Government Central Museum at Madras. 



The Eeport is of necessity almost entirely systematic in its scope, for none of the 

 specimens have been preserved with a view to ultimate anatomical investigation. The 

 Anomura do not offer many features of special interest as regards their internal anatomy, 

 and there is no reason to suppose that even the deep-water types differ to any great 

 extent from theii* shallow-water relatives. 



It is a matter of regret that in many cases the specimens are in an imperfect state of 

 preservation, but there can be little doubt that this condition is due rather to the 

 vicissitudes which the collection has undergone since the return of the Challenger, than 

 to any want of care during the expedition. 



