482 Recently published Ornithological Works. 



In this paper Dr. A. W. Malm gives further details on the 

 tracheal sac of the Emu^ already well known to exist from the 

 researches of Fremery, Knox, and Murie {of. P. Z. S. 1867, 

 pp. 405-415). The principal novel fact adduced relates to 

 the presence of two valve-like folds in the interior of the sac. 

 As regards the nse of this peculiar organ, Malm agrees with 

 Murie's view that it is in part instrumental in the production 

 of the curious ^' booming ■'"' of these birds in the breeding- 

 season. 



73. Malm on Duplicates of the Gothenburg Museum. 



[Gotbenbiu'g.s naturhistorisches Museum. Zool.-zoot. Abtlieikmgen. — 

 II. Catalog- liber Dubletteu ausgearbeitet you Dr. A. H. Malm. 8vo. 

 Gothenburg: 1880.] 



The birds in this list of duplicates are mostly Scandinavian ; 

 but some are of foreign origin. They are not very nume- 

 rous — about 200. 



74. Meyer's Guide to the Dresden Museum. 



[Fiibrer durch das koniglicbe-zoologiscbe Museum zu Dresden. l2mo. 

 Dresden: 1881.] 



We must thank Dr. A. B. Meyer for sending us a copy of 

 this little guide-book, which must be much appreciated by 

 visitors to the Royal Zoological Museum of Dresden. A con- 

 siderable zoological space seems to have been allotted to the 

 birds; and many interesting notes are given in the part of the 

 catalogue relating to them, though (as might be supposed) 

 nothing original. 



75. Meyer on Salvador^ s 'Papuan Ornithology.' 



[Salvadori's Omitbologie der Papua-Inseln und der Molukkeu. IBericht 

 von A. B. Meyer. J. f. O. 1880, p. 310.] 



A short explanatory notice of Salvadori^s work. 



76. Milne-Edwards on the Penguins. 



[Recbercbes sur la Fauue des Eegions Austra 

 iwards. Ann. d. Sc. Nat., Zool. vol. xxi. art. 



After general remarks on the antarctic fauna, M. Milne- 



[Recbercbes sur la Fauue des Eegions Australes. Par M. Alpb. Milne- 

 Edwards. Ann. d. Sc. Nat., Zool. vol. xxi. art. 4. Paris, 1880.] 



