CONTENTS. 
PART III.—1806. 
XI. On Hillebrandia, a new Genus of Begoniaceæ. a Professor OLIVER, F.R.S., 
F.L.S., Keeper of the Kew Herbarium |. . . ; | «x a page DOR 
XII. On the Spicula of the Regular Echinoidea. By CHARLES STEWART, Esq. Com- 
municated by Professor Huxuny, F.L.S. . . . +: 6 . . . . . . . . 865 
XIII. On some New British Polynoina. By E. Ray LANKESTER, Esq. Communicated 
le T O derriere, deg, BGA rg ans à re. 878 
XIV. On some points in the Anatomy of Echidna hystrix. By Sr. GEORGE Mrvanr, 
Esq., F.L.S., Lecturer on Comparative Anatomy at St. Mary's Hospital . . 379 
XV. On Circulation and the Formation of Wood in Plants. By HERBERT SPENCER, Esq. 
Communicated by GEORGE Busk, Esq., F.R.S., Sec. L.S. cov Bb 
XVI. On two New British Fungi. By the Rev. M. J. BERKELEY, M.A., F.L.S. . 491 
XVII. Lichenes Amazonici et Andini lecti a Domino SPRUCE. By the Rev. W. A. 
DIEN DEI PELEAS 00 8 oo. mox s a + UD 
XVIII. On Myostoma, a new Genus of the Burmanniaceæ. 2 Joux Miers, Esq., 
F.R.S. & L.S., Commend. Ord. Imp. Bras. Rose . . . l 
XIX. On the Development of Chloëon (Ephemera) dimidiatum. By SIR Joux LUBBOCK, 
Bart., F.R.S., V.P. Linn. Soc., Pres. Ent. Soc., V.P. INA. Bee. Fe. . . . 411 
XX. Observations on New-Zealand en = W. Lauper Linpsay, M.D., F.R.S. 
a Fo ey C . Dre Mud 
XXI. Contributions to a Natural History of the Teredidæ. By E. PERCEVAL WRIGHT, 
M.D., A.M., Professor of Zoology, University of Dublin, F.L.S., F.Z.S. . . 561 
