336 



ATKINSON— MORPHOLOGY AND 



[April 23, 



are attached below as well as above. The attachment below is not 

 the margin of these gills, but their point of origin from the inner 

 surface of the involute pileus margin. This will be clearly under- 

 stood from a study of Figs. 41 and 42. 



/234 5 6 78 9/0// 



Diagram 8. Zenith view into a basidiocarp of the same age. See text 

 for details not marked. 



Figs. 41 and 42 are from sections in the region of lines 10 and 

 II in diagrams 7 and 8. The gills are attached above and below. 

 But it is very clear here that the attachment below, as well as above, 

 is to the pileus. Since the gills are downward growths of the level 

 palisade, formed on the under surface of the pileus {%. e., perpen- 

 dicular to the level palisade), the attachment below in these figures, 

 as well as that above, is at the point of origin of the gills, and must 

 not be interpeted as an attachment of the gill margin to the stem. 



The First Ridges, or Salients, of the Hymenophore are the Fun- 

 daments of the Lamellce Theinselves. — The question of the origin 



