i6 



RESEARCHES ON FUNGI 



stage behind the long basidia, and the short basidia a stage behind 

 the mid-basidia. The basidia drawn in Fig. 10 represent the second, 

 third, and fourth generations only. Basidia belonging to the first 



Fig. 9. — Lepioia cepaestipes. Cross-section of part of a gill showing : the hymenium» 

 hy ; the subhymenium, sub ; and trama, tr. The trama has a peculiarly loose 

 texture and is chiefly composed of large transverse elements. The hymenium 

 is composed of paraphyses, e, and of basidia. The basidia are quadrimorphic : 

 they exhibit differential protuberancy. Those of the first generation, a, are 

 discliarging their spores. The spores of the second-generation basidia, b, will 

 be discharged next, then those of the third-generation basidia, c, and finally 

 those of the fourth -generation basidia, d. Magnification, 350. 



generation were not seen in the section from which the drawing 

 was made. 



The distribution of the basidia of the four generations in the 

 hymenium is shown in the camera-lucida drawing reproduced in 

 Fig. 7 at A (p. 14). The first-generation basidia have just shed their 

 spores and are collapsing : they are represented with their now 

 vacant sterigmata. The basidia of the other generations are repre- 



