EXPLANATION OF THE PLATES. 
PLATE 
I. MaRATTIA FRAXINEA.— Views of the rootstock and of its microsco- 
pical structure, to illustrate Mr. J. Buchanan's paper thereon. 
II. Fuxar, viz. Uromyces deformans and Puccinia corticioides, and mag- 
nified details of same, illustrating the Rev. M. J. Berkeley's descrip- 
tion of remarkable Fungi among the ‘ Challenger’ Expedition 
collection. 
III. DisARTICULATION OF BRANCHES.— Sketches showing mode of, accord- 
ing to the observations of Mr. R. Irwin Lynch. 
IV. | HzParICAE.— Structural peculiarities of new species from the Cape of 
V. Good Hope described by Mr. W. Mitten. 
VI. Ar&x.—New freshwater forms from the Cape of Good Hope, re- 
ferred to by P. F. Reinsch in his paper on the Rev. A. Eaton's 
* Transit-of- Venus' collection. 
VII. ] RUBIACEÆ.—New species of African forms, viz. Pentas parvifolia 
VIII. and Trichostachys vaginalis, characterized by Mr. W. P. Hiern. 
IX. NASTURTIUM ATLANTICUM. ) 
X. ARABIS DECUMBENS. 
XI. ARABIS CONRINGIOIDES. 
XII. Brassica ELATA. 
XIII. Brassica RERAYENSIS. 
XIV. RESEDA ATTENUATA. 
XV. LOTONONIS MAROCCANA. 
XVI. ONONIS POLYPHYLLA. New species of Plants, 
XVII. ONONIS ATLANTICA. with structural de- 
XVIII. TRIFOLIUM ATLANTICUM. 1 tails, described by 
XIX. RUBUS DEBILIS. Mr. J. Ball in his 
XX. SEDUM MODESTUM. * Spicilegium Flore 
XXI. GALIUM ACUMINATUM. Maroccane.” 
XXII. GALIUM BourG#ANUM,var. MAROCCANUM. 
XXIII. GNAPHALIUM HELICHRYSOIDES. 
XXIV. ANACYCLUS DEPRESSUS. 
XXV. ANTHEMIS TENUISEOTA. 
XXVI. CHRYSANTHEMUM ATLANTICUM. 
XXVII. THYMUS MAROCCANUS. 
XXVIII. SALVIA MAURORUM. J 
