INTRODUCTION. V 



the senior assistant in the department, in the determination 

 of those species which have been received without any in- 

 dication of their names, and the verification of their sy- 

 nonyma. But the British Museum is fortunate in having 

 received a large portion of its species (either in presents, 

 or by way of exchange or purchase) from the several au- 

 thors both in this country and abroad by whom the species 

 to which they belong were originally described, or from 

 the collections in which they first received their names. 

 In such cases there can be no doubt of the specimens be- 

 ing ascertained representatives of the names they bear. 



Thus, among the collections which have been received 

 as presents, those presented by 



The Hon. East India Company, are to be regarded as 

 authentic examples of the species described by Dr. 

 Horsfield, in his " Zoological Researches in Java," 

 and in his Papers in the Linnean Transactions ; 

 the Zoological Journal, and in the Proceedings of 

 the Zoological Society. 



The Hudson's Bay Company, as the types of the spe- 

 cies described by Dr. Richardson in his " Fauna 

 Boreali- Americana." 



The New Zealand Company, as the types of the species 

 discovered by Dr. DiefTenbach, in New Zealand, 

 and described by Mr. G. R. Gray, in the Appendix 

 of that traveller's Journal. 



Capt. Sir George Back and Capl. Sir John Franklin, 

 R.N., C.B. 9 for the specimens described in the Ap- 

 pendices to the accounts of the Northern Voyages. 



Mr. George Barclay, as the types of the species collected 

 during the voyage of H. M.S. Sulphur. 



Capt. Sir Edward Belcher, R.N., C.B., as the specimens 

 collected during the voyage of H.M.S. Sulphur. 



A. Bloxam, Esq., as the types of the specimens described 



