1898-1902. No. 21.] LICHENS. 37 



Cetraria hiascens (Fa.) TH. FR. TH. FR. Scand. p. 98. Am., Greenl., 

 Spitsb., Icel. Over earth. E. P. S. N. Ellesmereland, Cape Rutherford (14), 

 Framsharbour (17). Bedford Pim Island (21); King Oscar Land, Harbour- 

 fjord (26, 27, 31, 33), Goosefjord (3840), Vendom Kap (55); North Kent 

 (64); North Devon (66); Cardigan Straits (67). 



Cetraria islandica (L.) ACH. TH. FR. Scand. p. 98. Am., Greenl., 

 Spitsb., Icel. Over earth. E. P. S. N. King Oscar Land, Harbourfjord 

 (33), Goosefjord (40, 50), Landsend (58). The narrow form of this spe- 

 cies, crispa ACH., was met with in Greenland (1); King Oscar Land, 

 Harbourfjord (27), Goosefjord (38, 40). 



Cetraria juniperina (L.) ACH. TH. FR. Scand. p. 104. Greenl - 

 Over branches, moss and rocks. E. P. S. N. King Oscar Land, Exkrement- 

 bugten (56). 



Cetraria nigricans NYL. TH. FR. Scand. p. 100. Greenl. Over 

 earth and rocks. 



Cetraria nivalis (L.) ACH. TH. FR. Scand. p. 102. Am., Greenl., 

 Spitsb,, Icel. Over earth, and moss. E. P. S. N. Greenland (1), Beit- 

 stadsfjord (7), Twinglacier Valley (8), Cape Viele (10), Cape Rutherford 

 (14), Bedford Pim Island (20); North Lincoln (23); King Oscar Land, 

 Harbourfjord (24, 26, 32), South Cape (34), Goosefjord (44, 45, 51), Bra- 

 skerudslauen (63); North Devon (65); Cardigan Straits (67). 



Cetraria odontella ACH. TH. FR. Scand. p. 99. Am., Greenl. - 

 On stone. 



Cetraria pinastri (Scop.) ACH. TH. FR. Scand. p. 104. Am., Greenl. 



- Over wood and stone. 



Cetraria Richardsonii (HooK.) TUCK. NYL. Syn. I. p. 306. Am. 



- Over earth. 



Cetraria saepincola (EHRH.) ACH. TH. FR. Scand. p. 106. Greenl., 

 Icel. Over branches. 



Dactylina NYL. 



Dactylina arctica (Hoox.) NYL. NYL. Syn. I. p. 286. Am., Greenl., 

 Icel. Over earth. E. P. S. N. Greenland (3); Ellesmereland, Cape Viele 

 (10), Cape Rutherford (14), Bedford Pim Island (19); King Oscar Land, 

 Harbourfjord (27, 33), Goosefjord (39). 



Dufourea, ACH. 



Dufourea muricata LAUR. TUCK. N. A. L. I. p. 30 (as Cetraria ra- 

 mulosa HOOK.). Am., Spitsb. Over earth E. P. S. N. Ellesmereland, 

 Cape Viele (10), Framsharbour(15, 17); King Oscar Land, Harbourfjord 

 (26, 33), Goosefjord (3840), Renbugten (57); North Devon (65). 



