﻿! TK f XSOX — COJ'RIX IS 



fundamental tissue, is well shown. The connection of the lamellae 

 with the stem is still frail in these stages of development, and the 

 distinctness of the lamellae as independent structures is very evi- 

 dent when considered in relation to the first salients which appear 

 on the under surface of the hymenophore. 



In the older stages the edges of the lamellae become so firmly 

 pressed against the stem that the round edge is somewhat com- 

 pressed, as shown in figs. 43 and 44. The hyphae on the extreme 

 margin, which stain deeply in the younger stages where the con- 

 nection with the stem is loose, are now crowded to one side or have 

 lost their rich protoplasmic content, which now resides in the cells 

 of the hymenium, with the exception of the cystidia. In order to 

 free the lamellae from the stem, one preparation was purposely 

 overheated in smoothing out the paraffin ribbon. The result is 

 shown in fig. 44. In some of the lamellae the palisade layer of cells, 

 at the point where this section was made, still extends entirely over 

 the margin in the position which they occupied at an earlier period. 

 In others these palisade cells have been crowded to the side. 

 Either one or the other situation may occur on the same lamella 

 at different points, according to location of the section, since the 

 ?dge of the lamella varies throughout its length in this respect. 



Deceptive appearance of sections where the fundament 



<F THE HYMENOPHORE EXISTS ALSO AROUND THE UPPER END OF THE 



9EM. — Where the fundament of the hymenophore extends for a 

 sbrt distance down around the upper end of the stem, a situation 

 is ^resented which may lead to error in the interpretation of the 

 oriin of the lamellae. Tangential sections parallel with the axis 

 of ae stem (or slightly oblique) made very close to the upper end 

 of t e stem present a very deceptive appearance. Such a section 

 is sKwn in fig. 40, and perhaps represents a situation similar to 

 that presented by Levine (22) in his figs. 13 and 14, pi. 39, of 

 Coprius micaceus. Such sections, even at a much younger stage, 

 could ery well give the impression that the trama of the gills at this 

 time Oisisted of fundamental elements connected both with the 

 pileus h(\ stem; that the ridges or pockets between them gave rise 

 to the hmenium, the latter structures splitting along a median line 

 and appjximate halves of adjacent ridges or pockets uniting to 



