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EXPLANATION OF PLATE XXIV. 



I. The Moss Tribe. — 1. A patch of Wall Tortula (Tortula mu- 

 ralis) of the natural size. — 2. A single plant magnified ; a calyjjtra. — 

 3. A part of a theca with the Ud a. — 4. A theca from which the lid 

 b has been removed; a the tmsted fringe. — 5. A portion of the 

 theca viewed from within; shewing the teeth of the fringe. — 6. A 

 cluster of the yoimg thecse of Encalypta vulgaris, intermLxed with 

 succulent fibres. — 7. A cluster of the bodies supposed by some to be 

 anthers, in the same plant. — The two last figures are after Hedwig. 



II. The Jungermannia Tribe. — 1. A plant of the Grove Jung er- 

 mannia (J. nemorosa), natural size. — 2. A portion of the same mag- 

 nified; a leaves; b the sheath of the theca, sometimes called the ca- 

 lyx; c the theca emitting its spores. — 3. A leaf, bearing Httle warts, 

 a a, which break up into reproductive particles b; and are called 

 germruB. — 4, 5, 6. — One of the bodies supposed to be anthers, in dif- 

 ferent states, with the succulent filaments that are intermixed with 

 them. — 7. The calyptra of the theca, a little broken at its side. — 8. 

 Imperfect young theca. — 9. Two of the elastic elaters, ^vith the 

 spores that are nuxed among them. — These figures are copied from 

 Hooker's British Jungermannise, Tab. 21. 



