HEPATIC^, 287 



of our readers. These are, first, lenticular bodies, called 

 geynm(2, imbedded in cup-shaped, sessile receptacles on the 

 surface of the fronds of Marc/iantia. Thev have the power 

 of producing perfect plants, and thus seem to have some 

 analogy with the buds of higher vegetables. 



Secondly, on the extremities of the stems and tips of the 

 leaves of various species of Jun(/ermannia, at certain seasons, 

 green or yellowish powdery masses are found, which are 

 analogous to similar bodies found on a few of the Mosses, 

 especially that woodland favourite the Tetrajilds pellucidct. 



The Uepat'ica, though, comparatively speaking, a small 

 section of the large family of Cryptogamia, present consider- 

 able variation in the form and structure of both their con- 

 servative and reproductive organs. These have been care- 

 fully examined, and made the basis of different classifications, 

 as various authors viewed their respective importance. 



The large genus Jungermannia is itself a study, and has 

 been well wrought out by the labours of Hooker and Tajdor 

 in our own country, and by Lindenberg"^ and others on the 

 Continent. 



Dr. Taylor's remarks on the various genera and species 



* His work, ' Synopsis Hepaticarum Europsearum,' has been described as 

 " a model of accurate description and profound research." The contributions 

 of Hooker and Taylor merit similar praise. 



