Ixxxii INTRODUCTION. 



give a connected, though imperfect, view of thai particular 

 part of the country, and people visited by the expedition. 

 The papers, No. 2 and 3 in the Appendix, by Doctor 

 Leach, and Sir Everard Home, respecting the parasitic 

 Vermis which takes possession of the Argonaut shell, and 

 which clear up a long disputed point in natural history, 

 are reprinted from the Philosophical Transactions, by 

 permission of the venerable President, who is on all occa- 

 sions most ready to lend his cordial assistance to the dis- 

 semination of human knowledge. 



The other papers in the Appendix, illustrative of those 

 subjects in the animal, vegetable, and mineral kingdoms 

 which occurred along the line of the Zaire, as far, at least, 

 as the materials sent home would admit, were obligingly 

 drawn up by Doctor Leach and Mr. Koenig of the British 

 Museum, and by Mr. Brown, Secretary to the Linna?an 

 Society, and Librarian to Sir Joseph Banks ; to each and 

 all of whom, but more especially to the last mentioned 

 gentleman, for his excellent observations on the plants 

 found in the vicinity of the Congo river, the Editor has 

 to express his grateful acknowledgments. 



