i 9 2o] WALKER— CYA THUS 13 



high when the peridioles are just appearing (cf. Tulasne 9, 

 pi. 3, Jig. 6). Their mode of origin is entirely like that of C. fas- 

 cicularis as is shown in fig. 44, a higher magnification of the peridiole 

 seen at the left near the base in fig. 39. The only variation in 

 development is that the peridioles seem to appear simultaneously 

 all through the glebal region. That they show in the photograph 

 at the base is due to chance, for in examining the series it is clearly 

 seen that they are equally distributed in all parts. As differentia- 

 tion continues, we find the individual peridioles passing through 

 identically the same stages as described for C. fascicularis, but 

 while in that species the first peridiole differentiated was at the 

 base and remained somewhat in advance of the others throughout 

 its development, in C. striatus the upper peridioles soon outstrip the 

 lower ones, so that the upper ones have formed a definite palisade 

 layer before the lower ones have developed more than a small 

 cavity in the center (figs. 40, 41). The same is true at the time 

 of spore formation, the upper peridioles forming spores abundantly, 

 while the lower ones still show a palisade condition. The gelatini- 

 zation around the peridioles also takes place from above downward. 



The structure of the mature peridiole differs from that of C. 

 fascicularis only in its general proportions. All layers are much 

 thinner, but especially is this true of the inner wall of the peridiole, 

 which is often no more than 18 \x thick. Most of the apparent 

 thickness of the wall in fig. 46 is due to the long stalks of the 

 basidia which are shown in fig. 45. At maturity the interior of the 

 peridiole is completely filled with the long, slender, binucleate 

 spores characteristic of this species (fig. 47). 



The funiculus also shows much the same course of development 

 as in C. fascicular -is. In the mature funiculus the filaments making 

 up the coil become much more elongated, and therefore more 

 twisted, and the strands forming the attachment to the peridial 

 wall are more strongly developed. Figs. 41, 43. and 46 show stages 

 in its development. 



Striations ox wall of peridium — The presence of the stria- 

 tions on the inner portion of the upper part of the peridium of the 

 mature fruit body presents an additional point of interest. As 

 the fruit body reaches maturity, the three layers of the peridial 



