132 Zoological Proceedings of Societies. 
them were two undescribed species of Platycercus, Vig. Mr. Leadbeater 
stated his intention of describing these birds at an early opportunity. 
He also exhibited a specimen of the Chlamydosaurus Kingui, Gray, 
recently brought from Melville Island. 
Mr. Yarrel!, on behalf of Mr. Gould, exhibited a specimen of a 
Warbler, new to the British Fauna, which had been shot at Kilburn, in 
the month of October. 
This specimen was represented to be the Black Red-tail of Latham’s 
Synopsis ; the Sylvia Tithys of the same author’s Index Ornithologicus ; 
and the Bec fin rouge-queue of M. Temminck. Its more ordinary locality 
was stated to be the northern part of Europe. 
Mr. Yarrell also exhibited a specimen of the Plectrophanes Lapponica 
of Meyer, the Emberiza calcarata of Temminck, which had been taken 
in a net by a bird-catcher near London, late im the autumn. Two spe- 
cimens of this bird .also taken in England formed the subject of a paper 
by Mr. Selby in the 15th volume of the Transactions of the Linnean 
Society. The present specimen was the third example recorded of the 
occurrence of the bird in this country. 
Mr. Yarrell, on his own part, exhibited the breast-bones and trachee 
of a male and female Wild Swan killed in England, which differed in 
several points from the anatomical distinctions known to exist in the 
Hooper, parts of which were also shewn in comparison. 
The new species was stated to be nearly one-third less than the Hooper 
in size, yet the insertion of the trachea within the sternum was. much 
deeper in the new one, with this remarkable difference, that the convo- 
luted tube of the windpipe, after passing vertically through the whole 
length of the keel, took then a horizontal direction, and occupied the 
posterior flattened portion of the sternwm, a conformation which had 
never been found by Mr. Yarrell in the oldest male Hoopers. The tube of 
the trachea in the new species was shewn by comparison to be of smaller 
calibre, and the bronchie less than half the length of the same parts in 
the Hooper. Extracts from Hearne’s Voyages, and the Philosophical 
Transactions, were referred to, shewing that both species were known 
in North America, the smaller sort being more rare than the large. 
Mr. Yarrell did not propose any term for this hitherto unnamed spe- 
a a 
