VI INTBODUCTION. 



Capt. Clapperton, R.N., and Colonel Denham, as the types 

 of the species described by Messrs. Children and 

 Vigors, in the Appendix to their Travels in Central 

 Africa. 



Charles Darwin, Esq., as the types of the species described 

 in the " Zoology of the Voyage of H.M.S. Beagle." 



The Earl of Derby, Lieut.- Colonel Sir Thomas Mitchell* 

 His Excell. Capt. George Grey, Capt. Sturt, and Mr. 

 Jukes, as the types of species described by Mr. Gould 

 in his " Birds of Australia." 



Major- General Thomas Hardwiche, as the types of the 

 species described by him in the " Transactions of the 

 Linnean Society," or described and figured in Mr. J. E. 

 Gray's " Illustrations of Indian Zoology/' and other 

 papers on the subject. 



Mrs. Capt. Heywood, as the types of the species discovered 

 during the Niger expedition, and described by Mr. 

 Frazer in the 6t Proceedings of the Zoological Society." 



Bryan H. Hodgson, Esq., as the types of the species de- 

 scribed by him in his papers in the " Journal of the 

 Asiatic Society of Bengal " in the " Asiatic Researches," 

 and in the " Proceedings of the Zoological Society." 



T. C. Jerdon, Esq., as the types of the species described by 

 him in his Catalogue of Indian Birds, published in the 

 " Madras Journal of Literature and Science." 



William Elf or d Leach, M.D., as being the original speci- 

 mens named or described by that zoologist in his 

 various publications. 



John Reeve, Esq., and his son J. Russell Reeve, Esq., as the 

 types of species figured in Mr. J. E. Gray's " Illustra- 

 tions of Indian Zoology " and " Zoological Miscellany." 



John Richardson, M.D., as the types of the species de- 

 scribed by that zoologist in the " Fauna Boreali- 

 Americana." 



