300 A TEXTBOOK OF GENERAL BOTANY 

Fie. 362. Portion of hymenium of an ascomycete, Lachnea (see Fig. 366), 
showing asci in various stages of development and also paraphyses. (x 200) 

Fria. 363. Section of cuplike fruit body of Lachnea 
Above is the hymenium composed of asci and paraphyses. (x 25) 
are entirely similar. In the evolution of many lines of alge we 
‘see a progressive change from the fusion of similar gametes to the 
fertilization of eggs by sperms, whereas in the Phycomycetes this 
process appears to have been reversed. 
