110 Rhodora [May 



Schwein. Spec. F\. Am. Sept. Crypt. 9. 1821. Mndothcca plaiy- 

 phylloidea Duniort. Recueil d'Obs. sur les Jung. 11. 1835. Mado- 

 theca Jackii Schiffn. Lotos 48: 348. 1900. Porella Jackii C. Jensen, 

 Danmarks Mosser 1: 240. 1915. [Text figs. 14-40]. 



On rocks and trunks of trees. Maine: Auburn (E. D. Merrill 8); 

 Mt. Desert Island {E. L. Rand); vicinity of Schoodie Lake, Piscata- 

 quis County (A. If. E.); Bristol and Madison (E. B. Chamberlain 

 1344, lo03); Hebron (J. A. Allen); Southwest Harbor {S. A. Linsey); 

 Pleasant Ridge Township, Somerset County {E. B. Chamberlain 3287) ; 

 Farmington (J. F. Collins 1173); near Prospect Harbor (A. R. 

 Northrop). New Hampshire: Crawford Notch {E. Faxon); Jackson 

 and Franconia Notch (.4. W. E.); Madison {H. H. Bartlett 1250, 1251); 

 White Mountains {" E. T. 7"). Vermont: Willoughby {A. Lorenz); 

 Leffert's Mills, Chittenden County (C. M. Cooke, Jr.); Bolton 

 (A. IF. E.); Newfane {M. A. Howe, distributed in Amer. Hep. 87, 

 as M. platyphylla). Massachusetts: Dedhani and Brookline (E. 

 Faxon); AVest Newbury (C. C. Haynes); Woods Hole {A. W. E.); 

 Brewster (F. S. Collins). Rhode Island: Providence and North 

 Kingston (J. F. Collins 599, 798); Chepacket (G. IF. BurUngame 207) . 

 Connecticut: Hamden (1858), New Haven, Danbury, Bethany and 

 East Haven (D. C. Eaton); Kent, Ledyard, Hamden, Orange, West 

 Hartford, Meriden and Salisbury (A. IF. E.); Plainfield (./. L. Shel- 

 don); Stafford, Portland, North Haven, Bolton and Vernon {G. E. 

 Nichols); Southington {{E. B. Chamberlain 1437); Redding (C. C. 

 Haynes); Killingworth (F. IF. Hall); Canterbury {S. B. Hadley); 

 Portland and Glastonbury (F. Wilson); East Lyme (C B. Graves); 

 Durham (.1. Lorenz). To give a further idea of the distribution of the 

 species in North America the following stations outside of New 

 England may be given. Nova Scotia: near Indian Brook and in the 

 valley of the Barrasois, Cape Breton (6'. E. Nichols 42, 65, 1545); 

 Kentville (//. B. Bailey); Big Intervale and Baddeck, Cape Breton 

 (J. Macoun 55, 58) ; near Pictou {Howe & Lang 584) ; near Yarmouth 

 (J. Macoun 24); Sandy Cove (J. Z). Lowe 22). Ontario: Ottawa (J. 

 Macoun, distributed in Can. Hep. 9, as P. platyphylla); Algonquin 

 Park (J. Macoun 135); Owen Sound {Mrs. Roy). New York: Chit- 

 tenago and Clarkson (D. C. Eaton, 1855); Yonkers {E. C. Hoice); 

 Murray Island, Jefferson County {Robinson & Maxon 106); Mt. 

 Colburn {E. G. Britton 24), somewhat doubtful; L'ndercliff (C. C. 

 Haynes 330) ; Onteora {A. M. Vail 3) ; Bear's Head, Sand Lake (S. //. 



