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MTJSCI. 



General Remarks on Musci. 



Essential points of Muscoidal structure. 



A distinct axis with expansions analogous to ordinary leaves 

 in function and insertion, formed of simple series of cells, 

 and no cutis. No stomata except at the base of the capsule 

 where the structure requiring aeration is of considerable 

 thickness. 



Tendency to a perianth often very distinct in the male flow- 

 ers. 



Undoubted (from analogical and structural reasoning,) 

 sexes. 



Pistilla genuine, ovula one, undergoing no other subsequent 

 change than one of situation. Pistillum torn up from its 

 base by the growth of the theca. Capsule having no continui- 

 ty of structure with the axis formed in the upper end of the 

 growth from the original ovula ; furnished with an operculum, 

 an inner membrane with or without ciliar processes, and a 

 columella. 



Mosses pass generally into Marchantiaceae through x\ndraea, 

 and through Jungermannia partially, i. e. organs of vegetation 

 by Bridels' filicoid division, i. e. leaves with oblique attach- 

 ment. 



On the Developemtnt of the Reproductive organs of Musci. 



Both the really reproductive organs, and those by which 

 such reproduction is supposed to be brought about are termi- 

 nal and aggregate. The former are situated in fact on t ie 

 apex of the axis which is here rather swollen and much more 

 lax than the more inferior part. Several are situated together, 

 mixed with cellular filaments and oblong cellular grumous bo- 

 dies, of the nature of which I am quite ignorant. All these 

 parts are surrounded and covered in by the concave perichce- 

 tial leaves. 



These female organs are filiform, obtuse, with an enlarged 



