380 



COMPARATIVE MORPHOLOGY OF FUNGI 



proceeds. This cell divides by an oblique wall to an anterior lower and 

 a posterior upper cell, both of which then divide transversely, the two 

 lower of the cells thus formed corresponding to the basal pair of the 

 marginal cells in the adult. The anterior of the two upper cells continues 



Fig. 256. — 1, 2. Rickia circumdata, mature individuals. 3. Rickia inclusa. 4. Rickia 

 admirabilis. 5. Rickia encymonalis. 6. Tettigomyces acuminatus. 7, 8. Rickia rostel- 

 lata. 9. Rickia coptengalis. 



to divide transversely until the normal number of cells characteristic of 

 the anterior series has been reached. The posterior of these two upper- 

 cells, although it may divide transversely, eventually divides longitudi- 

 nally, the inner of the resulting cells organizing the axial series by repeated 

 transverse division, while the outer similarly organizes the posterior series. 



