442 RESEARCHES ON FUNGI 



to collapse together, should be contained in one small section such 

 as is here represented. There is only one coming-generation 

 basidium, namely, no. 6. Others, doubtless, were only just missed 

 when the section was cut. The future-generations basidia are 

 nos. 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, and 18. The paraphyses 

 are nos. 19, 20, 21, and 22, and possibly nos. 7 and 9 ; but I have 

 assumed that nos. 7 and 9 are very short basidia on account of their 

 being already so broad in an early stage of the development of the 

 hymenium. The contents of nos. 7 and 9, unfortunately, were 

 not observed. It is likely that there were paraphyses attached to 

 the subhymenial cells nos. V and VI, but that they were torn away 

 in cutting the section. Other paraphyses, resembling no. 19 with 

 its subhymenial cell no. Ill and no. 21 with its subhymenial cell 

 no. IV, may have been just excluded from the section. One such 

 set of cells would fit in nicely in front of basidium no. 13, from 

 which position it may well have been removed. Once more we 

 can notice the absence of any level plane separating hymenium and 

 sub hymenium. The oldest basidia, or at least some of the oldest, 

 are the longest of all. Nos. 2 and 4 are remarkable for the depth 

 to which their shafts descend to attach themselves to subhymenial 

 cells of the lowest layer. The basidium no. 2 arises from the cell 

 no. XXIII, and no. 4 from no. XXIX ; and the lower part of the 

 basidial shaft of each is completely enveloped by subhymenial 

 cells. With the position of origin of basidium no. 2 should be com- 

 pared the positions of origin for elements nos. 10, 9, and 19 ; and 

 with the position of origin of basidium no. 4 should be compared 

 the positions of origin for elements nos. 15, 16, and 21. The sub- 

 hymenium consists of rounded or oval cells, and can be divided 

 very roughly into four rows of cells : I to VI inclusive, VII to XXI 

 inclusive, XXII to XXXIII inclusive, and a fourth layer of a few 

 cells only, XXXIV to XXXVI inclusive. The paraphyses are 

 always superficial in their origin, but basidia arise at various 

 levels of the hymenium, the older ones tending to be most deeply 

 seated and the younger ones to be situated more and more toward 

 the exterior. 



A little more of the trama is shown in Fig. 150 than in the two 

 preceding Figures. It will be noticed that the larger tramal cells, 



