348 

 Fig. 3. 



X y 



p. Cladosriorium LrcsH, sliomnf; the structure of the flocci, ami a septate sporidiferous biaiulilet. 

 q. SporiiUferous biauchlet in a younger stage. r. A portion where the sporidia appear to have been 



matured in the main portion of the floccus. The four figures not referred to are various forms of sporidia. 

 X, y. The sporidia of Zygodesmns Bcrkeleyi. 



It is with no design to forward my own views that three of the four 

 species are placed in genera aheady recognized ; my feelings were for 

 long opposed to this, but after mature examination I could find no 

 differences sufficient whereon to found new characters. It is tme, 

 that two of the species do not perfectly accord with the genera in 

 which they have been placed, such having been constructed with re- 

 ference only to the kinds then known ; so slight however are the dis- 

 crepancies, as will be seen by the parentheses, that I have deemed it 

 but prudent to admit them. 



Thomas G. Rylands. 



Bewsey House, Warrington, 

 September 14, 1842, 



Art. LXXXIX. — Analytical Notice of the ^Transactions of the 

 Botanical Society? Vol. i. ft. ii. Edinburgh : Maclachlan, 

 Stewart & Co. ; H. Bailliere, London. 1841. 



(Continued from p. 322). 



VIII. On the Botanical Characters of the British Oaks. By R. K. Gre- 

 viLLE, LL.D., F.L.S., &c., Vice-President of the Botanical Society. 



For three years previously to the publication of this paper the au- 

 thor was engaged in the examination of the British oaks, with a view 

 to ascertain the characters by which each so-called species may be 

 distinguished from its congeners: the results of this investigation are 

 here published. The paper is accompanied by two plates, wherein 

 are delineated the most striking forms of leaf which have come under 

 the author's notice, together with the peduncle and young fruit ; and 



