PREFATORY NOTES. 



THE collections to which these Catalogues refer is confined to the 

 Fauna of Europe, together with that of the Arctic and North Atlantic 

 Oceans, including the Seas connected with them. 



The North Atlantic Ocean is here regarded as terminating towards 

 the South at lat. 35 N. ; or, at a line drawn from a little to the South 

 of the Straits of Gibraltar on the Eastern, to about Cape Hatteras on 

 the Western side. This boundary is adopted as perhaps the best to 

 embrace the Arctic and Temperate regions, and, at the same time, to 

 exclude the tropical animals of the Gulf of Mexico. The entire area 

 of the Mediterranean is of course included. 



These Catalogues are printed in order to make known to Curators 

 of Museums and private Naturalists the present condition of my 

 collection, and to invite exchange. 



Opportunities of adding species, which are among my desiderata, 

 either by exchange or purchase will, I hope, thus be afforded to me. 



I shall be glad to send, in return for animals received, species either 

 from the present or other classes of Invertebrata which may be 

 preferred. Of course it will be understood that a Catalogue which 

 embraces my entire collection necessarily includes a large number of 

 forms of which there are no duplicates. 

 Letters should be addressed, 



BURNMOOR RECTORY, 



FENCE HOUSES, 



Co. DURHAM, ENGLAND. 



i. The Echinodermata are chiefly defective in N.E. American 

 forms, especially the Holothuroidea. The Fauna of the Great Depths 

 of the Atlantic is scarcely represented, while many Mediterranean 

 and recently described Arctic species are also much wanted. 



2. I shall be especially obliged for examples of the Arctic, abyssal 

 Atlantic, and other Pantopoda, which are absent in the present list. 



January nth, 1886. 



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