144 EVANS 



the new species differs in the structure of its midrib. Although 

 in both of these species there are only 2 rows of cortical cells 

 antically, there are normally 4 rows postically. 



2. MYLIA VERRUCOSA Lindb. 

 Mylia verrucosa Lindb. Acta Soc. Sci. Fenn. 10: 236. 1872. 

 Locality, Mount Kuishi, Tosa. Collector, Okamura (no. 

 1 15), October, 1904. This rare species has already been reported 

 by Yoshinaga l under the name Leioscyphus verrucosus (Lindb.) 

 Steph. Lindberg first recorded it from Saghalin and Amur, 

 but it was apparently not collected in any other localities until 

 it was found in Japan. 



3. RADULA OYAMENSIS Stephani. 



(PI. VI, figs. 6-10.) 



Radula oyamensis Stephani, Hedwigia 23 : 149. 1884. 



Loosely tufted, dark and dull green; stems 0.15 mm. in di- 

 ameter, irregularly pinnate, the branches widely spreading, 

 similar to the stem but often with smaller leaves ; leaves imbri- 

 cated, the lobe convex and often reflexed at the apex, widely 

 spreading, broadly falcate-ovate, 1 mm. long, 0.7 mm. wide, 

 attached by an almost longitudinal line of insertion, rounded at 

 the antical base and arching partially or wholly across the axis, 

 antical margin strongly rounded, apex broad and rounded, pos- 

 tical margin also rounded, forming an angle of 90 or more with 

 the keel, margin everywhere entire ; lobule subrhombiform in 

 outline, 0.45 mm. long, 0.35 mm. wide, more or less inflated 

 along keel and in basal portion, otherwise appressed to the 

 lobe, inner margin attached by an almost longitudinal line of 

 insertion for half its length or more, not dilated, free margin 

 straight, forming a blunt or rounded angle with the inner 

 margin, extending almost at right angles to the axis and sub- 

 parallel with the keel, outer margin straight, subparallel with 

 the axis, forming a rounded or very obtuse angle, the apex 

 with the margin free, apex tipped with a hyaline papilla, not 

 borne in a distinct depression, keel more or less arched, 



1 Bot. Mag. Tokyo 17 : (38). 1903. 



