loo The Ottawa Naturalist. [August 



at Meeche's Lake, near Chelsea, Que., Sept. 23rd, 1893 ; on limestone 

 rocks, close to the Ottawa River, Gatineau Ferry, Rockcliffe, Nov. 

 12th, 1896. 



XXXVIII. TRYPETHELIUM, Spreng. 



419. Trypethelium virens. Tuck. 



On beech trunks on "Pine Hill" in Rockcliffe Park, and Beech" 

 wood Cemetery, April 26th, 1891 ; on beech trees at Casselman, and 

 at King's Mountain near Chelsea, Que., May 22nd, 1897. 



XXXIX. PYRENULA, (Ach.) 



420. Pyrenula punctiformis, (Ach.) 



On bark of trees at Carleton Place, May 12th, 1892; on maple 

 trees near Hintonburgh, April i8th, 1896 ; on trunks of sugar maple, 

 "Pine Hill," Rockcliffe Park, April i6th, 1896. 



421. Pyrenula gemmata, (Ach.) 



On old maple trunks in McKay's Woods near the lake, April 

 i6th, 1891. 



422. Pyrenula mamillana, (Ach.) 



On bark of maple trees in old woods, Carleton Place, May 12th, 

 1892. 



423. Pyrenula nitida, Ach. 



Quite common on beech trunks around Ottawa. On beech trees 

 in Rockcliffe Park and McKay's Woods, April 26th, 1891 ; on beech 

 trees at Moose Creek and Casselman, Sept. 6th, 1891 ; on trees at 

 Aylmer, Que., May 6th, 1891. 



424 Pyrenula thelena, Ach. 



On canoe birch in woods along the Beaver Meadow, Hull, Que. 

 April 24th, 1897. 



425. Pyrenula fallaciea. 



On bark of young maples at Chelsea, Que., May 15th, 1891. 



426. Pyrenula cine. 



On young maple trees at Ottawa, May 7th, 1892. 



