334 



ATKINSON— MORPHOLOGY AND 



[April 23, 



the surface of the stem, and a portion of the same area in Fig. 34 

 also belongs to the hymenophore. The hymenophore, as interpreted 

 here, and in all of my recent papers, includes not only all parts of the 

 lamellae and the paHsade cells between adjacent lamellae, but also a 

 thin, often indefinite zone of the subadjacent tissue corresponding to 

 the subhymenial tissue of the palisade between the gill origins. As 

 figure 35 shows, the " stalls," or " pigeon holes," in the angle of 

 pileus and stem are quite small because the gill origins extend but 



/ P3^ 3 78 9 10 // 



Diagram 7. Lateral view through one half of a basidiocarp in an older 

 stage than that represented in diagrams 5 and 6. The hymenophore has all 

 passed over into the gill stage. The gill area does not extend so far down 

 on the stem as in diagram 5. The margin of the pileus is more strongly in- 

 volute and the veil tissue has been crowded up against the middle portion of 

 the gills. C = the portion of the annular cavity not filled. See text for 

 other details not marked here. 



a short distance down on the upper surface of the stem. The abrupt 

 ending of this hymenophore tissue below is even with the margins 

 of the gills on either side, and the lower edge is free from the ground 



