260 GEOLOGICAL SURVEY OF CANADA. 



Pleris gracilis, Michx., Fl. Bor.-Am., ii., 262. Swartz, Syn. Fil., 99. 



Pursh, Fl. Am. Sept., ii., 668. Hook., Fl. Bor:-Am., ii., 264. 

 Allosorus gracilis, Presl, Tent. Pterid., 153. Gray, Man., Ed. 2, 591. 

 Allosorus Stelleri, Ruprecht, Distr. Crypt- Vase, in Imp. Ross., 47. 



Lawson, Can. Nat., i., 272. 

 Pellsea Stdleri, Beddome, Lawson, Fern Fl. Can., 235. 



Occurs in the crevices of rocks from Labrador to British Columbia, 

 but is by no means a common species. Morris Eock, Eestigouche, and 

 Grand Falls, St. John, KB. (Fowler.} Madawaska, KB. (Hay.} 

 Woodstock, KB. (Jack.} Mingan Islands, Que. (St. Gyr.} On crystal- 

 line limestone, near the Lake of Three Mountains, Eiver Eouge, Que. 

 (Z>' Urban.} Cacouna, Que. (J. W. Dawson.} Eiviere du Loup, Que. 

 (Thomas.} Crevices of limestone rocks near Hemlock Lake, Ottawa, 

 Ont. (Fletcher.} Lakefield. Ont. (Mrs. Traill} On Guelph dolo- 

 mites, Little Saugeen Eiver, Durham, Grey Co., Ont. (H. M. Ami.} 

 Crevices of wet rocks at the mouth of the Temiscami Eiver, about 

 twenty-five miles from the east end of Lake Mistassini, K E. Ter. ; 

 summit of Mount Queest, Gold Eange, B.C., altitude 7,000 feet. (J. M. 

 Macoun.} Crevices of rocks near L'Anse a Fallon, Cape Eosier, Ste. 

 Anne des Monts Eiver, Gaspe", and Gunn Eiver, Anticosti, Que. ; lime- 

 stone rocks along the Eiver Moira near Belleville, Foster's Flats below 

 the Whirlpool, Niagara Falls, rocks at Owen Sound, along the Kaminis" 

 tiquia Eiver at and below the Kakabeka Falls, under the cliffs at Eed 

 Eock and Nepigon stations on the C. P. Ey., crevices of the Huronian 

 slates seventeen miles from Michipicotin on the Magpie Eiver, Ont. ; 

 Peace Eiver Pass, Eocky Mountains, K W. Ter.; crevices of rocks 

 in rear of the C. P. Ey. water-tank at Kicking Horse Lake, Eocky 

 Mountains, and at Mount Stephen, B.C. (Macoun.) Eocky hillsides, 

 not common, Kootanie District, B.C. (Anderson} Canada. (Goldie}, 

 to the Saskatchewan. (Drummond}, in Hook. Fl. Bor.-Am. 



(2983.) P. atropurpurea, Link, Fil. Hort. Berol., 59. Lawson, 

 Can. Nat., i., 272. Watt, Can. Nat., iv., 363. Macoun & Burgess, 

 Trans. Eoy. Soc. Can., ii., Sect, iv., 184. 



Pteris atropurpurea, Linn., Sp. PI., 1534 Michx., Fl. Bor.-Am., ii., 261. 

 Pursh, Fl. Am. Sept., ii., 668. Hook., FJ. Bor.-Am., ii., 264. 



A widely distributed but very local fern, ranging from Ontario west- 

 ward to British Columbia and northward to Great Bear Lake. Hamil- 

 ton, Ont. (Logie.} Not rare in the crevices of limestone cliffs in 

 the Dundas Eavine, Dundas, Ont. (Burgess.} Limestone rocks, 

 Klora, Ont. (McPherson.} Crevices of rocks at the Whirlpool and 

 Foster's Flats, Niagara Falls, Ont. ; common at various places on rocks 



