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



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

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

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

 fjord (26, 27, 31, 33), Goosefjord (38-40), 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, rnoss and rocks. E. P. S. N. King Oscar Land, Exkrement- 

 bugten (56). 



Cetraria nigricans NVL. 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 Pirn 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 Rickardsonii (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 (HooK.) 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 Pirn 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). 



