Receyitlij puhUshed Ornithological Wo)ks. 341 



50. Finsch's Lists of the Birds of the Ley den Museum. 



[Zur Catalogisii'ung' cler ornitholog'isclien Abtlieiliing voii Dr. 0. Finsch. 

 VI.-IX. Notes Leyden Mus. xxiii. pp. 1, 33, 58, 97.1 



Dr. Finsch proceeds with his catalogue of the birds in the 

 Leyden Museum (see Ibis, 1891, p. 725) and his remarks 

 thereupon, and now treats of the Meropidse, Muscicapidae, 

 Certhiidse, and Cuculi. A new species, Cyornis hosii, is 

 described from Borneo, and a complete revision of this 

 difficult genus is 'given. The supposed Cu cuius canoroides 

 of the Malay Archipelago is re-united to the European 

 C. canorus. Various other notes and comments on the 

 birds of these groups are given. 



51. Hacker on the Song of Birds. 



[Der Gesang der Vtigel, seino anatomisclien uiid biologisclieu Giund- 

 lagen. Von Dr. Valentin Hacker. 8vo. Jena, 1900. Pp. G, 102. 

 G. Fischer. Price 3s. Qd.'\ 



This interesting little volume, abundantly and clearly 

 illustrated, gives in the first place an account of the anatomy 

 of the bird's syrinx. There is naturally not a great deal of 

 novelty in this part, excepting, indeed, that the syringes arc 

 often exhibited in longitudinal section, thus emphasizing the 

 different thickness of the tracheal aiul bronchial rings which 

 constitute the organ. The latter part of the volume deals 

 exclusively with the phenomena of song in birds. 



52. Hall on the Species of Gymnorhina. 



[A Revision of the Genus Gymnorhina. By Robert Hall. Proc. Roy. 

 Soc. Victoria, xiv. pp. 1-9.] 



Mr. Hall shews that many intermediate forms exist 

 between the white-backed G. leuconota and the black-backed 

 G. tibicen, upon some of which the supposed species 

 G. hyperleuca and G. dorsalis have been founded. He 

 proposes to reduce thtm all to one species, and to call it 

 G. leuconota. But if this is done the name '^ tibicen''' of 

 Latham has the priority and should be employed. As a 

 general rule, however, the white-backed and the blacK-backcd 

 birds are readily distinguishable. 



