278 



HEPATIC^, Juss., Be Cand. 



{Lichen aud Liclienailrum of Dill. Part of Ahja, Linn. Musci 

 Frondosi, Sm. CuhjptralcB DeoperculalcB, IMohr.) 



" If by the microscopic glass 

 Survey'd, you'll see how far surpass 

 The works of nature, in design, 

 And texture delicately fine, 

 And perfectness of every part. 

 Each effort of mimetic art ; 

 And as the gardener's watchful care, 

 The ground, of native clothing bare, 

 ludues with vegetable soil ; 

 And with the waste's collected spoil 

 The tender plants exposed defends ; 

 So the Great Gardener mindful sends 

 These mossy tribes wherewith to shun 

 The pinching frost, the scorching sun." 



In the Introductory Chapter, we referred to the difTerent 

 forms of Cryptogamic Vegetation that had been classed, 

 by Dillenius and other botanists of his and previous eras, 

 among what are now regarded as true Mosses, comprising 

 such forms as Tangly Lichenes, Alga. 



Among these there is a family whose general appearance 

 is so nearly allied to the Musci, as to render them popularly 

 regarded as identical. The entire structure of some of them 



