NEOTTIELLA. 



371 



margin composed of hyaline, septate, cylindrical, thin-walled 

 hyphae that are sometimes branched, 80-100 x 6-7 /x, the 

 hyphae are often arranged in little bundles; excipulum 

 parenchymatous, cells elongated in the direction from base 



Neottiella polytrichi. Fig. 1, small specimens, natural size; — Fig. 2, 

 specimen, X 5 ; Fig. 3, section of portion of excipulum, x 400 ; — Fig. 4, 

 ascus with spores and paraphyses, x 400; — Fig. 5, spores in various 

 stages of development, x 800. 



to margin ; cortical cells irregularly polygonal, 12-18 /x, 

 giving origin to the external hairs; asci cylindrical, apex 

 slightly truncate, base rather suddenly narrowed into the 

 pedicel, 8-spored ; spores obliquely 1 -seriate, hyaline, con- 

 tinuous, ends acute, with one large median oil-globule, for 



2 b 2 



