So The Ottawa Naturalist. [June 



334. Leptogium Tremelloides (L.) Fr. 



On rocks and trunks ; common. On boulders and trees north of 

 the Aylmer Road, west of Hull, Que., April 27th, 1895 ; on trees in 

 Dow's Swamp ; on boulders in Beechwood Cemetery ; in McKay's 

 woods, and on " Pine Hill," Rockcliffe Park ; on old logs and rocks 

 King's Mountain, May 22nd, 1897. 



33S- Leptogium chloromelum, (Sw.) Nyl. 



On old rails near Aylmer and on damp rocks near the summit of 

 King's Mountain, west of Chelsea, May 22tid 1897. 



336. Leptogium respulinum, Ach. 



On limestone rocks near the Ottawa below Governor's Bay, Rock- 

 cliffe Park, April i6th, 1891. 



XVHI. PLACODIUM (DC.) 



337. Piacodium elegans, (Link.) DC. 



On a large boulder in woods. Governor's Bay, Rockcliffe Park, 

 April i6th, 1895. 



338. Piacodium aurantiacum, (Lightf.) 



On trees and rocks ; also on dead wood. On a granite boulder 

 in woods, Governor's Bay, Rockcliffe Park, April 17th, 1895 ; on lime- 

 stone rocks at Britannia ; on boulders in woods west of Hull and on 

 boulders at Leamy's Lake, Oct. gth, I'Sge. 



339. Piacodium cerinum, (Hedw.) 



Common on trees, on dead wood and mosses. On maple and 

 poplar bark Stewart's bush near the C. A. R. track, April 12th, 1895 i 

 on dead trees and living ash bark at Britannia ; on poplar bark south 

 of the Aylmer Electric Road, west of Hull, Que. ; on black ash Ottawa. 

 East; on trunks in woods at Leamy's Lake; on poplar trees in a 

 swamp at Stittsville ; on old rails and trunks King's Mountain, May 

 22nd, 1897. 



340. Piacodium vitellinum, (Ehrh.) 



On dead wood and rocks. On old pine rails at Britannia, April 

 20th, 189s ; on cedar rails Ottawa East ; on boulders in pasture by 

 Brigham's Creek- on old rails and logs. King's Mountain, May 22nd, 

 1897. 



341. Piacodium vitellinum, (Ehrh.) var. aurellum, Ach. 



On granite boulders in woods. Governor's Bay, Rockcliffe Park, 

 April 17th, 1895 ; on boulders in woods north of the Aylmer road 

 west of Hull, Que.; on boulders Ottawa East ; on boulders in pastures 

 by Brigham's Creek, May 7th, 1897. 



