iv ——  CONTENTS. 
VIII. Description of a Species of Tringa, killed in Cam- 
bridgeshire, new to England and Europe. By William | 
Yarrell, Esq., F.L.S.° Communicated by the Zoological 
Club of the Linnean Society - E E - p. 
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. E p- 
X. Description of a new Species of Phalangista. By 
Thomas Bell, Esq., F.R.S. & L.S. - - p. 
XI. On an undescribed Species of the Genus Pasch. 
By Mr. Benjamin Leadbeater, F.L.S. ^ p. 
XII. Observations on some Species of the Genera Tetrao and 
Ortya, 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. 
XIII. Account of a new Plant of the Gastromycous Order 
of Fungi. By J. E. Bowman, Esq., F.L.S. - p. 
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, Lir.L.S.  - - - p- 
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. 
XVI. Descriptions of the new Genera and Species of the Class 
Composite belonging to the Floras of Peru, Mexico, and 
Chile. By Mr. David Don, Libr. L.S. - p. 
XVII. On the Organs of Voice in Birds. By William 
109 
115 
121 
129 
133 
151 
155 
159 
169 
Yarvell, Fe, FES: -i - - p: 905 
XVIII. A Synopsis of the Testaceous Diluhóhoiredokitt 
Mollusca 
