CONTENTS. 
XIV. The Natural History of Oiketicus, a new and sin- . 
gular Genus of Lepidoptera. By the Rev. Lansdown 
Guilding, B.A. F.L.S. - eiii Rs 
XV. Observations on the Trachee of Birds; with Descrip- 
tions and Representations of several not hitherto figured. 
By William Yarrell, Esq., F.L.S. - - p. 
XVI. On two new Genera of Land Tortoises. By 'Thomas 
Bell, Esq., F.L.S. Communicated by the Zoological 
Club of the Linnean Society - - - p. 
XVII. Of the Insect called O1srnos by the Ancients, and 
of the true Species intended by them under this Appel- 
lation: in reply to the, Observations of W. S. Mac- 
Leay, Esq., and the French Naturalists. To which is 
added, A Description of a new Species of CUTEREBRA. 
By Bracy Clark, F.L.S., and Foreign Member of the 
Royal Academy of Sciences of Paris -  - p- 
XVIII. A Review of the Genus Combretum. By Mr. 
George Don, 4.L.S. - - = TB 
XIX. Description of a new Genus of Plants belonging to 
the Order Nymphaacee : in a Letter to H. T. Cole- 
brooke, Esq., F.R.S., F.L.S. By Nathaniel Wal- 
lich, DE L.S, E RIS D. dc à ee p. 
XX. Observations and Experiments, made with a view to 
ascertain the Means by which the Spiders that produce 
Gossamer effect their aérial Excursions. By John 
Blackwall, Esq., F.L.S. - - ~ - p. 
XXI. 
vil 
371 
378 
392 
412 
442 
449 
De- 
