[ 2^5 ] 
fearch muft_ be a vain one. The fruaification in 
theie plants is for the moft part covered with a thin 
membrane, which Mr. Miles calls a fort of fungus 
or tubercle (Phil. Tranf. N“. 461.) and whichfat 
Its hrft appearance, and for home time afterwards, 
leerns to have its margin clofely adhering to the leaf. 
th it is probable 
that the floors do not blow till the margin has de- 
tached itfelf from the leaf, and admits the air to 
come under it, for the maturation and difperfion of 
the pollen. This may, perhaps, point out the cri- 
tical time for fearching for the anthers. However 
this may be, the antherse and pollen are probablv 
very minute; and as it is no eafy talk to niake the 
examination of what is concealed under thefe mem- 
branes with a fingle microfcope, to which the glafles 
we have uled are commonly applied, we have not 
yet^tound the means of difcovering them. The feed 
veflels and feeds have been already well defcribed 
and figured by Mr. Miles; however, as fome deli- 
neations were made of them as they appeared to us, 
they will accompany the other drawings (Figures 2 c 
26, 27, 28, 29, 30, 31, 32, 33, 34, 3^, 36 ) and 
may ferve to confirm Mr. Miles’s account of them. 
in the male flowers of Marchantia Polymorpha 
^inn. the grains of pollen were obferved in a thick 
tuft of hairs, where they feemed rather to have lodged 
thenifelves accidentally after their difperfion, than to 
e aftxed to them as they are defcribed by Linnsus 
(Farma crinulo affixa. Gen. Plant.) Thefe hairs, 
viewed with the microfcope, had a remarkable ap- 
pearance each hair confifting of a double chain, 
and each chain being compofed of round bodies 
Vou LV. M m placed 
