

APPENDIX. 



An the preceding sketch, I have had frequent occasion to refer 

 to the wonderful diversity of Fossil Shells which presented 

 themselves in different quarters of this interesting country ; 

 but in order to preserve connection, I have refrained from 

 mixing up with the text, the description of them, when de- 

 scribing the different localities in which they occurred ; and I 

 am the more satisfied with having done so, because, with the 

 assistance of Captain Brown, who has already so greatly distin- 

 guished himself as a conchologist, I am enabled to present to 

 the Society a very distinct, and, I trust, what will be found to 

 be a very interesting account, of these fossils. And as the 

 work is wholly his, I hope I may be allowed at least to bear 

 testimony to the acuteness, the unwearied and anxious per- 

 severance with which that gentleman prosecuted his investi- 

 gations, on objects truly microscopic, sparing neither time nor 

 trouble, in satisfying himself of the accuracy of his observations, 

 or in execution of the beautiful drawings with which he has fur- 

 nished me of those which he considers new, together with a very 

 correct drawing (see PI. X. fig. 8.) of the specimen from the 

 summit of Mount Cao, mentioned in the text, of which I have 

 had occasion to take so much notice. I requested him to make 

 this drawing, in order to preserve a specimen, that I fear, 

 has every chance of being unique ; a merit which, however 

 gratifying to the self-love of the mere collector, does not add 

 to its value in a geological cabinet. A faithful and accurate 

 engraving is the only means of remedying this evil. 



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