UNPUBLISHED CORRESPONDENCE OE LINNAEUS. 
All the unpublished letters of Linnaeus must possess great interest . 
One of the following letters is in the possession of Mr. Gould, and 
the second, with two others, were procured by him for our inspec- 
tion, and with permission to publish if we deemed them sufficiently 
interesting. Both the following letters are written to the Rev. John 
White, brother to White of Selborne, and the last is addressed 
to him at Gibraltar, at the period when he meditated his Fauna 
Calpensis. Allusion is made to this work in the two other let- 
ters, which will be given in an early number, but so far as we 
have been able to discover, we cannot find that this work was ever 
published, neither can we trace the MSS. Dr. White must have 
been some time in correspondence with Linnaeus, as he is mentioned 
as about to write to him, in a letter from Dr. Solander to Mr. 
Ellis in 1762. The present letters bear a date ten years later, 
or about the time when the correspondence of Linnaeus was at its 
fullest, and embraced that of nearly every naturalist in the world. 
To the ornithologist these letters are interesting, as pointing 
out that the authority for Hirundo ( cypselus ) melba , in the 12th 
edition of the Sy sterna, 1766, was probably taken from Edwards, 
and that the species was first seen at the date of this letter ; 
while the H. rupestris does not occur in the 12th edition at all, 
and was probably only referred to from some question put by 
Mr. White. In the 12th edition, the Pratincole is placed with the 
swallows, and the remarks will be read with interest. Linnaeus 
bad apparently not seen this form in 1772. Motacilla tithys is 
omitted in the 12th edition as a species, though noticed as p. 
under the Phcenicurus . 
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