94 EXPLANATION OF FIGURES IN PLATES. 



Plate II. — Phyhactinia coeyi,ea. 



Pig 20 a, b. — Ascogonium with four cells ; the apical cell uninucleated and nar- 

 rowed above by pressure of surrounding hyphas. Penultimate cell binucleated, 

 nucleus of basal cell in next section. 



Fig. 21 a, b. — Ascogonium four-celled ; basal cell with two nuclei. 



Pig. 22. — Ascogonium with five cells; penultimate cell budding out in asco- 

 genous hyphae; nuclei of second and third cells in another section. 



Pig. 23. — Perithecial cells with resting nuclei and a metaphase stage of nuclear 

 division ; nucleolus near one pole of spindle. 



Pig. 24. — Resting nucleus from mycelial hypha with central body connected with 

 chromatin. 



Pig." 25 a, b. — ^Ascogonium with five cells ; penultimate cell budding out in asco- 

 genous hyphse; apical cell still connected to thick-walled antheridium. 



Pig. 26.- — Median section of older ascocarp, showing sections of ascogenous 

 hjrphae, antheridium, etc. ; peripheral cells swollen, in some cases in preparation 

 for pushing out as hyphal branches. 



Pig. 27. — 'Median section of still older ascocarp, showing portion of ascogonium 

 and sections of multinucleated ascogenous hyphse. 



Pig. 28. — Section showing cells of ascogonium and ascogenous hyphse at stage 

 when latter become septate. 



Pig. 29 a, b. — Sections showing the pushing out of the cells of the ascogenous 

 hyphas to form the young asci. 



Pig. 30. — iMedian section of ascoEarp just after fusion of nuclei in the young 

 asci; two or more layers of cells around the asci, with dense content and thin 

 walls ; peripheral cells on upper surface of ascocarp swelling out to form penicil- 

 late cells. 



