INTRODUCTION TO CBYPTOGAMIC BOTANY. 



269 



left for his successors ; and it is to Tulasne and his hrother that 

 we are'especially indebted for the elucidation of many difficulties, 

 and the brilliant discovery of numberless new facts. Some of 

 their views had indeed already been anticipated by Fries, 

 though at the time they were first set forth the microscope had 

 not attained anything like its present perfection, insomuch that 

 it is wonderful how he could do so much with such indifferent 

 instruments, or perhaps with no very great respect for them. 

 Observations of great value, and multitudes of excellent figures, 

 have emanated from many other quarters ; but it is contrary to 

 our plan to give anything like a history of the science. 

 Keferences will be found to the most important works in the 

 subjoined catalogues. 



278. The following arrangement is essentially that of Fries, 

 only slightly modified as regards the members which enter 

 into the second division. 



i 



-s- r 



.9 

 ■■3 



o 



^ 



OS 



AscoMYCETES. — Asci formed from the fertile cells 

 of an hymenium. 



Phtsomtcetes. — Fertile cells seated on threads not 

 compacted into an hymenium. 



Htphomtcetbs. — Spores naked, variously seated 

 on conspicuous threads, [which are . 

 rarely compacted ; mostly small in 

 proportion to the threads!) 



CoNiOMTCETES.— Spores naked, mostly terminal, 

 seated on inconspicuous threads, 

 free or inclosed in a perithecium. 



Gasteromtcetbs. — Spores naked. Hymenium in- 

 closed in a peridium, seldom rup- 

 tured before maturity. 



Htmenomtcetes.— Spores naked. Hymenium free, 

 mostly naked, or if inclosed at first 

 N soon exposed. 



