CONTENTS. vii 



PART III.— 1851. 



XVIII. Note on Samara Iseta, Linn. By G. A. Walker-Arnott, Esq., LL.D., 

 F.L.S. 8gc., Regius Professor of Botany in the University of Glas- 

 gow P^g^ 359 



XIX. On a new Genus of Plants of the Family of Burmanniaceae. By John 

 MiERs, Esq., F.R.S., F.L.S. &!c 373 



XX. On Jansonia, a new Genus of Leguminosse, from fVestern Australia. 



By Mr. Richard Kippist, Lihr. L.S. 8^c 383 



XXI. On the Structure of the Ascidia and Stomata of Dischidia Rafflesiana, 

 Wall. By the /«^e William Griffith, Esq., F.L.S. <Sfc. Communicated 

 by R. H. Solly, Esq., F.R.S., F.L.S. 8fc 387 



XXII. On the Impregnation of Dischidia. By the late William Griffith, Esq., 

 F.L.S. 8fc. Communicated by R.BROwfi, Esq., P^.P.L.S. Sfc. . .391 



XXIII. On Athalaraia, a new Genus of Marcliantiese. By Hugh Falconer, 

 Esq., M.D., F.R.S., F.L.S., Superintendent of the Hon. East India 

 Company s Botanic Garden at Calcutta, 8fc 397 



XXIV. On the early Stages of Development of Lenianea fluviatilis, Agardh. 

 By G. H. K. Thwaites, Esq., Lecturer on Botany and Vegetable Phy- 

 siology at the Bristol Medical School. Communicated by the Rev. M. J. 

 Berkeley, F.L.S. 399 



XXV. On Meliantheae, a new Natural Order, proposed and defined by J. E. 

 Planchon, Docteur-es-Sciences. Communicated by the Secretary . 403 



XXVI. On the Formation and Use of the Air-sacs and Dilated Trachece in 

 Insects. By George Newport, Esq., F.R.S., F.L.S. 8^c. . . .419 



XXVII. On the Anatomy and Affinities of Pteronarcys regalis, Newm. : with 

 a Postscript, containing Descriptions of some American Perlidse, together' 

 with Notes on their Habits. By George Newport, Esq., F.R.S., F.L.S. 

 8fc 425 



