CATALOGUE OF CANADIAN PLANTS. 43 



on Douglas Fir and other young trees at Victoria, and on Alnus 

 rubra at Comox, Vancouver Island. {Macoun.) Hot Spring, Una- 

 laska and Sitka, Alaska. {Evans.) 



Radula arctica,S\.e'ph.., collected at Chlowak and Chilcat, Alaska, 

 by the Drs. Krause, is referred here by Dr. Howe. 



iVi. R. tenax, Lindb 



On the bark of trees. Alert Bay, Vancouver Island, 1885. {Dr. 

 G. M. Dawson^ 



49. PORELLA, DiU. 



172. P. navicularis, (Lehm & Lindb.) Lindb. 



Observatory Inlet, British Columbia. {Dr. Scouler.) Vancouver 

 Island. {Dr. Lyall.) Chilcoot, Alaska. {Krause.) On trees at 

 Hastings, Burrard Inlet, B.C. ; quite common on boulders in 

 woods, on rocks, on old logs, and on trees in swamps at Victoria 

 and on trees at Comox, Vancouver Island ; on trees and rocks, 

 Salt Spring Island, Gulf of Georgia ; and on rocks at Yale, Fraser 

 River, B.C. {Macoun.) On trees, Alert Bay, Vancouver Island. 

 {Dr. G. M. Dawson.) Hot Spring, Alaska. {Evans.) 



1'73. P. platyphylla, (Linn.) Lindb. 



A very common species throughout eastern Canada. 



At the base of trees, Canaan Forks, and Ntver's Rapids, 

 Queen's Co., N.B. {Moser.) On rocks, North West Arm, Halifax, 



N.S.; on trees at Yarmouth, N.S. ; on rocks and trunks at Mar- 

 garee. Cape Breton Island, N.S., July, 1898 ; on trees at Grand 

 Etang, Gaspe Co., Que. ; on trees at Ottawa, Ont. ; on rocks at 

 Sudbury Junction, Algoma ; on trees and rocks at Belleville, Hast- 

 ings Co., Ont.; on rocks at Owen Sound, Ont.; Nipigon River, 

 Ont.; on trees, Queenston Heights, Ont., 1901 ; on trees in woods, 

 Cache Lake, Algonquin Park, Ont., June 6th, 1900. {Macoun.) 

 On trees, River Rouge, Argenteuil Co., Que. {D'Urban.) On 

 Missinaibi River, Algoma. {Dr. R. Bell.) Guissen, Alaska. 



Krause.) 



