664 



THE AMERICAN NATURALIST [Vol. XL 



34. Pyxine sorediata Fr.— Not uncommon on beech in Sub- 

 Canadian zone. Sterile. 



35. Umbilicaria hyperborea Hoffm.— Found both on the top of 

 Bigelow Hill on boulders, and on the summit ledges of ^Vlonadnock. 



36. Umbilicaria muhlenbergii f Ach.) Tuck.— Growing on pasture 

 rock at the base of the mountain. Fertile. 



37. UmbiUcaria diUenii l^u-k.— Common on ledges in the Sub- 



3S. Umbilicaria pennsylvanica Ilott'm.— Several specimens were 

 collected on ledges at about 2.")()() feet elevation. Fertile. 



39. Umbilicaria pustulata papulosa Tiiek. — ( oiniium on ])asture 



40. Sticta amplissima (Scoj).) Mass. — Common on yellow birch 

 on the mountain and also on rocks on Bigelow Hill. Fertile. 



41. Sticta pulmonaria (L.) Ach.— Common in both Tran-sition 



instances on rocks. Sterile. 



42. Nephroma tomentosum (Hoffm.) Koerb. — One example on 

 rock in Sub-Canadian zone. Fertile. 



43. Nephroma Isevigatum Ach. — One example on rock, Sub- 



44. I ?) Peltigera canina ( L. i Hoffm.— On ground over ledges, 



4.'). Pannaria lanuginosa (Ach. I Koerl). — Common on rocks in 

 the two lower zones. Sterile. 



4(). Ephebe soUda Born.- One exani|)le on ro. k. Bigelow Hill. 

 Determined through the kindness of Dr. Herbert Richards of 

 Barnard College, X. Y. 



47. Leptogium tremelloides fL. fil.) Fr. — One e\ann)le on rock, 



45. Placodium vitellinum fFhrh.) Xoeo-. e^- Hep]>. — One e.x- 



49. Lecanora rubina lA'iii.i - ( 'omnion on rock on Biirelow 

 Hill. Fertile. 



5(). Lecanora subfuFca I,, i Ach. ( )ne e\;unp!e on yellow birch 



51. Lecanora pallescens s L. ; .S huer.— One example on yellow 

 birch in Sub-Caiuidian zone. Fertile. 



