120 BIOLOGICAL SOCIETY OF WASHINGTON. 



Physcia aquila, Nyl. var. detonsa, Tuck. 

 " pulverulenta, Nyl. 

 " stellaris, L. 

 ' " vur. aipolia, Nyl. 



astroidea, Ach. 

 " crispa, Nyl. 

 " tribacia, Tuck. 

 " caesia, Nyl. 



obscura, Nyl. 



" " var. endochrysea, Nyl. 



" adglutinata, Nyl. 

 Pyxine sorediata, Fr. 

 Fain. 3. PELTIGEREI. 



Sticta pulmonaria, Ach. 

 " amplissima, Mass. 

 " quercizans, Ach. 

 Nephroma Isevigatum, Ach. 



" Helveticum, Ach. 

 Peltigera scutata, Leigh tf. 

 " aphthosa, HofF. 

 " polydactyla, Hoti. 

 " rufescens, Hoff. 

 " horizontalis, Ho ft". 



canina, Hoft". 



" " var. spongiosa, Tuck. 



" " " sorediata, Sch. 



. " " " spuria, Ach. 



Fam. 4. PANNAKIEI. 



Endocarpiscum Guepini, Nyl. 

 Physma luridum, Mont. 

 Pannaria lanuginosa, Koerb. 

 " leucosticta, Tuck. 

 " microphylla, Delis, 

 tryptophylla, Mass. 

 " molybdaea, Tuck. 



nigra, Nyl. 



" rubiginosa, Delis. 

 Fam. 5. COLLEMEI. 



Pyrenopsis Schaereri, Nyl. 



