580 THE PUR SEALS OF THE PRIBILOF ISLANDS. 



Hylocomium triquetrum, Scliimp. 



St. Paul Island. (Dr. Merriam; Palmer.) 



HEPATK^AE. 

 Diplopliyllum taxifolium, Nees. 



St. Paul Islaud. (Dr. Merriam; J. M. Macouu.) 



Herberta adunca, S. F. Gray. 



St. l*aul Islaud. (Dr. Merriam.) 

 Gymnomitrium coralloides, Nees. 



St. Paul Island. (Dr. Merriam; J. M. Macoun.) 



LICHENS (COLLECTED BY .J. M. MAOOTTN). 

 Ramalina cuspidata, (Ach.). 



On rocks and earth, St. Paul Island. Gracilis: altitudo 4 to 7 cm, ; sporae, 10 to 

 14 mik. 



Ramalina polymorpha, Ach. 



On rocks, St. Paul Island. Ne<pic haec neqtic praecedens Jcalio colonitur, 

 Cetraria aculeata, (Schrcb.), Fr. 



On earth, St. Paul Island. 

 Cetraria arctica, (Hook.). 



On earth, St. Paul Island. 



Cetraria islandica, (L.) Ach. 



Very common and variable on both islands; the forms gracilis and robnsta growing 

 with the type. 



Cetraria islandica var. delisoei, (Hor.). 



Common on St. Paul Island. 

 Cetraria cucullata, (Bell.), Ach. 



On earth, St. Paul Island. 



Cetraria nivalis, (L.), Ach. 



On earth on both islands. 



Cetraria fablunensis, (L.), Schaoi'. 



On rocks, St. Paul Islaud. 



Cetraria lacunosa, Acli. 



Oh rocks and earth on botli islands. 



Alectoria jubata, (L.), var. chalybaeforniis, Ach. 



On earth on rocks, St. Paul Island. 

 Alectoria divergens, Wahlenb. 



Mixed with the last. Medula chlorvalvio ruhescit. 

 Alectoria thulensis, Fr. Flics. 



Common on earth on both islands. 

 Theloschistes lychneus, (Nyl.), var. pygmaeus, Vr. 

 Rare on rocks, St. Paul Island. 



