580 THE PUR SEALS OF THE PRIBILOP ISLANDS. 



Hylocomium triquetrum, S chimp. 



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



HEPATICAE. 

 Diplophyllum taxifolium, Nees. 



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

 Herberta aduuca, S. V. Gray. 



St. Paul Island. (Dr. Merriam.) 

 Gymnoiiiitriuin coralloides, Nees. 



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



LICHENS (COLLECTED BY J. M. MACOUN). 



Ramalina cuspidata, (Ach.). 



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

 14 mik. 

 Ramalina polymorpha, Aoh. 



On rocks, St. Paul Island. Neque haec neque praecedens kalio coloratur. 



Cetraria aculeata, (Sohreb.), Fr. 



On earth, St. Paul Island. 

 Cetraria arctica, (Hook.). 



On earth, St. Paul Island. 

 Cetraria islandica, (L.) Aoh. 



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

 with the type. 

 Cetraria islandica var. delisoei, (Bor.). 



Common on St. Paul Island. i 

 Cetraria cucullata, (Bell.), Ach. 



On earth, St. Paul Islaud. 

 Cetraria nivalis, (L.), Ach. 



On earth on both islands. 

 Cetraria fahlunensis, (L.), Schaer. 



On rocks, St. Paul Islaud. 

 Cetraria lacunosa, Ach. 



On rocks and earth on both islands. 

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



On earth on rocks, St. Paul Island. 

 Alectoria divergens, Wahlenl). 



Mixed with the last. Medula chlorcalvio rubesoit. 

 Alectoria thulensis, Fr. Fries. 



Common on earth on both islands. 

 Theloschistes lyohneus, (Nyl.), var. pygmaeus, Fr. 



Rare on rocks, St. Paul Island. 



