SEERMOGONES. 31 



organs stand together indiscriminately upon the 

 same surface. 



The spermogones are also developed centri- 

 fugally, at least so far as at present observed, for 

 when they are produced in a cluster the central one 

 first opens and discharges its contents, and thus the 

 development proceeds outwards from the centre to 

 the circumference. W Tien the spermogones are 

 scattered, as in those of Euphorbia, they are first 

 observed at the apex of the leaf, whence they are 

 developed in succession towards the base. The 

 latter should be sought for on the young plants of 

 the wood-spurge in March or April, at which time 

 we have found them abundant at Darenth wood, 

 near Dart ford. 



It must not be concluded, from the fact that we 

 have not yet adverted to spermogones in connection 

 with other fungi, that they are peculiar to the 

 /Eddiaci i. Such is by no means the case. As we 

 have hereafter described other genera and species 

 in which spermogones occur, it would be out of 

 place to enter upon further details here. Let it 

 suffice therefore that we state that they have been 

 found in members of the geie ri, Ar-jnut, Triph-rag- 

 mium, Puccinia, Lecythea, Trich basis, and Uredo, 

 but they have been found much more generally in 

 Rwstelia and JEJcidium than in any other genus. 



As comparatively little is yet known of these 

 bodies, a fair field is open to the enterprising 

 naicroscopist, with time at his disposal, and a good 



