PRELIMINARY NOTICES. 



Enough has, perhaps, been said concerning the quinary 

 arrangement of Birds proposed by Mr. Vigors, in the Intro- 

 duction, see page 41 ; but as Mr. Macleay, the original 

 propounder of the s) stern, has given us a learned and valu- 

 able paper, in the sixteenth volume of the Linnean Trans- 

 actions, relative to the analogies existing between Birds 

 and the Mammalia, it may be useful to observe that he has 

 proposed the following comparative Table; 



MAMMALIA. AVES. 



1 Ferce Carnivorous 1 Raptores. 



2 Primates Omnivorous 2 Insessores. 



3 Glires Frugivorous 3 Rasores. 



i tt j , f Frequenting the > . ^ , 7 . 



4 Ungidata \ . S 1 .. c ° . > 4 Grallatores. 



a ( vicimly of water, S 



5 Cetacea Aquatic 5 Natatores. 



Corrections arid Additions to Ornithologia. 



Colymbus minor, or Di dapper, page 11. This is a mistake; 

 it is the Fulica chloropus, or Moor-Hen. 



Turdus musicus, or Song-Thrush, page 18. In regard to the 

 structure of the nest of this bird, see forwards in the Letter to 

 the Editor of the Magazine of Natural History, 



Hirundo esculenla, or esculent Swallow, page 23. The 

 Chinese carry on a large trade in these birds' nests. It is said 

 that the quantity annually sent from Java to China is 242,000 

 lbs. the export value of which is estimated at £284,000. What 

 there can be in these superior to the gdatine to be obtained 

 from innumerable animal substances the luxurious Asiatics can 

 best explain. 



Sleep <f Birds, page 57. Ducks will also sleep while floating 

 on the water; and, most probably, many other of the natatoria 

 tribe; hence the facility of their moving from one region of the 

 earth to another. 



Incubation of Birds, page 60. Mr. Sweet, Mag, Nat. Hist, 



