40 Rhodora [FEBRUARY 
A FURTHER NOTE oN THE LICHENS OF NANTUCKET.— I spent last 
summer from June 25 to August 7, 1917, at Nantucket, Mass., and 
during my stay collected the following species of lichens additional to 
those included in my two previous lists (RHopora 14:88-90. 1912. 
& 15:93-94. 1913). 
Usnea plicata (L.) Web. Depauperate on fence rails. 
Ramalina fasciata (Pers.) Ach. emend. On trees. 
Cetraria tenuifolia (Retz.) Howe. One station. 
Physcia stellaris (L.) Nyl. On locusts. 
~. Nephromopsis ciliaris (Ach.) Hue. On old fence rails. 
Parmeliopsis aleurites (Ach.) Nyl. On old fence rails. 
Lecanora varia (Ehrh.) Nyl. On trees. 
Specimens of most of the species known from this island are now on 
exhibition in the rooms of the Maria Mitchell Association.— R. 
Heser Howe, Jr., Thoreau Museum, Concord, Massachusetts. 
Vol. 20, no. 229, including pages 1 to 20, was issued 25 January, 1918. 
