184 The Ottawa Naturalist. [December 



478. Lecanora gibbosa, Nyl. 



On flat limestone rocks, Blueberry Point, Aylmer, Que. 

 April 25, 1900 



479. Lecanora calcarea, (Linn.) Sommerf. 



On limestone rocks along- the Rideau River below Hogs- 

 back. May 2, 1897. 



480. Lecanora laxa, Branth (Ms.) 



On limestone rocks along the Rideau River below Hogs- 

 back. May 2, 1897. 



481. Lecanora tuscata (Schrad.) Th. Fr. 



On limestone rocks along the Rideau River at Hogsback. 

 May 2, 1897. 



482. Rinodina sophodes var. exigua, Fr. 



On limestone rocks in Rockcliffe Park, April 17, 1895 ; 

 also along the Rideau River at Hogsback. May 2, 1897. 



483. Pertusaria pustulata, (Ach.) Nyl. 



On old cedar rails on the road to Kingsmere north of 

 Aylmer, Que. May, 22, 1897. 



484 Biatora coarctata, (Nyl.) Tuckerm. 



On limestone rocks at Britannia. April 20, i?95- 



485. Biatora rivulosa, (Ach ) Fr. 



On bark of living beech trees in Rockcliffe Park and at 

 Billings' Bridge. April iq, 1898. 



486. Biatora atropurpurea, (Mass.) Hepp. 



On beech bark near Hemlock Lake, near Beechwood 

 Cemetery. Sept. 6, 1891 



487. Biatora cyrtella, (Nyl.) Tuckerm. 



On the bark of Alnus incana near Hogsback, May 2, 

 1897 ; on young maples in Billings' Bush, April 28, ic^oo. 



488. Biatora globulosa (Floerk ) Hepp. 



On poplar bark in Stewart's Bush, Ottawa. April 13, 

 1895. 



