Vi CONTENTS. 



X. Description of the Mora Tree. By Mr. Robert H. Schomburgk. Com- 



municated hy George Bentham, E,sq., F.L.S page 207 



XI. On the Structure q/*Cuscuta europeea. By Charles C. Babington, £*9., 



M.A., F.L.S., F.G.S., ^c 213 



XII. Note on the Identity of three described Species of Acacia. By Charles 



Lush, M.D., F.L.S. 21/ 



XIII. On the Number and Structure of the Mammulse employed by Spiders in 

 the Process of Spinning. By John BhACKWAhh, Esq., F.L.S. . .219 



XIV. Observations on some Genera of Plants connected with the Flora of 

 Guiana. By George Bentham, Esq., F.L.S 226 



XV. On the Existence of Stomata in Mosses. In a Letter to Richard Horsman 



Solly, Esq., F.R.S. <§• L.S. By William Valentine, Esq., F.L.S. 239 



XVI. A New Systematic Arrangement of J^ertebrated Animals. By C. L. 

 Bonaparte, Prince of Musignano, F.M.L.S., S;c 247 



XVII. Description of a new Genus of Plants belonging to the Natural Family 

 Bignoniacese. By David Don, Esq., Libr. L.S., Prof. Bot. King's Coll. 

 Lond 306 



XVIII. Descriptions of the Indian Species of Iris. By David Don, Esq., 

 Libr. L.S., Prof. Bot. King's Coll. Lond 309 



XIX. An Account of the Indian Species of Juncus and Luzula. By David 

 Don, Esq., Libr. L.S., Prof. Bot. King's Coll. Lond 317 



XX. Description of the Lepidosiren annectens. By Richard Owen, Esq., 



F.R.S. , F.L.S., F.G.S., Hunterian Professor in the Royal College of 

 Surgeons, London 327 



XXI. Observations on the Spongilla fluviatilis. In a Letter to the Secretary. 

 By John Hogg, Esq., M.A., F.R.S., L.S. 8s C.P.S. 363 



XXII. Further Observations on the Spongilla fluviatilis ; with some Remarks 

 on the Nature of the Spongise Marinse. In a Letter to the Secretary. 

 By John Hogg, Esq., M.A., F.R.S., L.S. 8s C.P.S. 368 



XXIII. Illustrations of the Relationships existing amongst Natural Objects, 



