iv CONTENTS. 



VIII. Description of a Species of Tringa, killed in Cani' 

 bridgeshire, new to England and Europe. By William 

 YarreW, Esq., F.L.S. Communicated by the Zoological 

 Club of the Linnean Society - - - - p. 109 



IX. An Account of Margarodes, a new Genus of Insects 

 found in the Neighbourhood of Ants' Nests. By the 

 Rev. Lansdown Guilding, B.A. F.L.S. - p. 115 



X. Description of a new Species of Phalangista. By 

 Thomas BeW, Esq., F.R.S. 4- L.S. - - p. 121 



/ XI, On an undescribed Species of the Genus Phasianus. 



By Mr. Benjamin Leadbeater, F.L.S. - p. 129 



XII. Observations on some Species of the Genera Tetrao and 

 /v Ortyx, Natives of North America ; with Descriptions of 



Four new Species of the former, and Two of the latter 

 Genus. By Mr. David Douglas, F.L.S. - p. 133 



XIII. Account of a new Plant of the Gastromycous Order 



of Fungi. By J. Hj. Bowman, Esq., F.L.S. - p. 151 



XIV. On the Origin and Nature of the Ligulate Rays in 

 Zinnia; and on a remarkable Multiplication observed 

 in the Parts of Fructification of that Genus. By 



Mr. David Don, Libr. L.S. - - - p. 155 



XV. Some Observations on the Common Bat of Pennant : 

 with an Attempt to prove its Identity with the Pipis- 

 trelle of French Authors. By the Rev. Leonard 

 Jenyns, M.A. F.L.S. Communicated by the Zoolo- 

 gical Club of the Linnean Society - - - p. 159 



XVI. Descriptions of the new Genera and Species of the Class 

 Compositce belonging to the Floras of Peru, Mexico, and 

 Chile. By Mr. David Don, Libr. L.S. - p. 169 



XVII. On the Organs of Voice in Birds. By William 

 YarreW, Esq., F.L.S. p. 305 



XVIII. A Synopsis of the Testaceous Pneumonobranchous 



Mollusca 



