—58- 
prises a total of 321 species, distributed as follows: Marchantiaceae 4, Ricciaceae 
2, Metzgeriaceae 9, Jungermanniaceae 56, Anthocerotaceae i, Sphagnaceae 17, 
Bryaceae 232. 
Yale University 
LICHENS OF THE LAKE GEORGE REGION 
Stewart H. Burnham 
{Continued) 
148. Peltigera aphthosa (L.) Willd. On earth and mossy rocks; common. Speci- 
mens collected Oct. 18, 1905, near Tripoli are reported in the N. V. 
State Mus. Bull. 105: 24. 1906; having the thallus variegated with 
whitish patches, which is due apparently to the epidermis having been 
eaten by some small creature. 
149. Peltigera canina (L.) Willd. Growing in locations similar to those of 
preceding species; abundant. 
150. Peltigera canina sorediata (Schaer.) Fink. Wooded bank west of Tripoli 
cemetery, May 30, 1918; determined by Mr. Merrill. 
151. Peltigera canina spongiosa Tuck. " This variety occurs . . near Warrens- 
burg." (Peck) in N. Y. State Mus. Rep. 53: 854. 1900. Ravine 
southern base of Sugar Loaf Mt., Sept. 19, 1917; east of Thompson's 
gravel-bed, July 8, 1917. East of Tripoli in low woods, Nov. 12, 1913; 
determined by Mr. Merrill, who says "with portions of the thallus 
developing a mat of rhizoids below as in v. spongiosa Tuck." 
152. Peltigera canina undulata Del. Peaked Mt., Oct. 23, 1918; determined by 
Mr. Merrill. 
153. Peltigera horizontalis (L.) Hoffm. Rotten wood at Shushan, July 7, 1907 
(Dobbin); falls in West brook, W. Fort Ann, Aug, 20, 1907; rocks near 
Wiggins iron mine, June 8, 191 7, determined by Mr. Merrill. 
154. Peltigera polydactyla (Neck.) Hofifm. Huletts Lg. (Jelliffe); Shushan, June 
9, 1907 and Cambridge waterworks swamp, Sept. 2, 1913 (Dobbin); 
Black Mt., Barber trail, Aug. 19, 1909. 
155. Peltigera rufescens (Neck.) Hoffm. Huletts Lg. (Jelliffe). 
156. Peltigera rufescens praetextata (Flk.) Nyl. Peaked Mt., May 26, 1918, 
on thin rocky soil; stones in woods southeast of Vaughns schoolhouse, 
Aug. 19, 1914. Both collections determined by Mr. Merrill, who says, 
"unrecognized by others in America but I have identified it from many 
localities." 
157. Pertusaria amara (Ach.) Nyl. West of Tripoli schoolhouse on trunks of 
Juglans cinerea, Dec. 5, 19 14; determined by Mr. Merrill. 
158. Pertusaria globularis Ach, Peaked Rock on Iledwigia albicans, May 19, 
1906. 
159. Pertusaria leioplaca (Ach,) Schaer. E. Galway on Castanea dentala (Burt); 
