1 921. No. 15. LICHENS FROM THE GJÜA EXPEDITION. 



Peltigevci WiLLD. 

 crnuiprns (Tayl.) Wain. A few plants from Herschel Island. 



Physcia (Schrf.b.) Wain. 



>iuiscigciia (AcH.) Xvl. Gjøa Harbour and Herschel Island, very abundant. 

 Well developed, also fertile specimens, agreeing entirely with Norwegian 

 plants (spores 24 — 32 X 12 — 15 //). The two Caloplaca species often grow 

 on the thallus of this lichen; a parasite is common on the thallus. (3-septate 

 dark spores, 16 — 18.5X9//) 



Ramalirici Ach. 



Almquistii Wain. Pitlekai p. 17. Herschel Island. 

 M\- plants agree entirely with Wainios authentic specimens. This 

 indicates a very wide distribution. 



Rinodina (Mass.) Stiz. 

 roscida (Somrft.) One small plant from Herschel Island. 



Stereocaulon Schreb. 



alpiniim Laur. King Point, and Herschel Island, very common. The 

 plants from King Point have more incise phyllocladia and approach to 

 6". paschalc. 



Toninia (Mass.) Th. Fr. 



syncomista (Flk.) Th. Fr. Gjea Harbour and Herschel Island. The 

 former plant with typical 3 septate spores, the latter has quite as frequently 

 one- or two-septate spores, cfr. Th Fr. Scand. p. 336. 



Thaninolia Ach. 



vennicitlaris (Sw.) Ach. Gjøa Harbour, King Point, and very plenti- 

 fullv from Herschel Island. 



