Il8 CUMMINGS 



Thallus very thin, covered beneath with a network of 



cream-colored veins canina membranacea. 



Thallus thicker, veins dark-colored. 



Apothecia transversely oblong, veins blackening. 



horizontalis. 



Apothecia elongated, revolute, veins \)rovfn...polydactyla. 

 Surface of the thallus downy or granulate. 



Thallus granulate .pulverulenta. 



Thallus downy. 



Thallus reddish-brown, crisped on the edges rufescens. 



Thallus greenish-gray or ash-brown, not crisped on the 

 margins. 



Thallus with distinct veins underneath canina. 



Thallus covered with a spongy nap underneath. 



canina spongiosa. 



140. Peltigera canina (L.) Hoffm. 



Lichen caninus LINNAEUS, Fl. Suec. noo. 1755. 



Peltigera canina HOFFMANN, Fl. Germ. 2 : 106. 1795. SOWERBY, Eng. Bot. 

 /. ing. 



Locality not given (Coville and Kearney, 576) ; Lowe Inlet, B. C. 

 (Trelease, 1089) ; Vancouver Island, Broughton Strait (Trelease, 

 1084) ; Yakutat (Trelease, 1065, 10650) 5 Aguadulce River, Yakutat 

 Bay (Trelease, 1064) ; Hidden Glacier Inlet, Yakutat Bay (Trelease, 

 1063, 1093*$) ; Disenchantment Bay, Yakutat Bay (Trelease, 1091, 

 1096, 1097, 1098); Juneau (Setchell, 1243, 1249); Muir Glacier 

 (Trelease, 1054, nocxz) ; Farragut Bay (Trelease, no number) ; Orca 

 (Trelease, 1061) ; Port Wells (Trelease, 1056^); Kadiak (Trelease, 

 1055, 1075) ; Agattu Island (Townsend, 76) ; Cape Fox (Trelease, 

 1070, 1085). Other Alaskan records are: Sitka, Port Mulgrave, 

 Unalaska, Port Chatham in Cook Inlet, Dr. Bean, collector; St. 

 Paul Island and St. George Island, collected by Macoun. Dr. Cooley 

 collected specimens at Salmon Creek, near Juneau, which are doubt- 

 fully referred to this species. Under the synonym Peltidea canina 

 Ach., Babington reports its occurrence at Kotzebue Sound. 



With these specimens were fragments of Lcptogium^ Nephroma, 

 and other species of Peltigera. A number of the specimens are 

 sterile. 



141. Peltigera canina spongiosa Tuck. 



Peltigera canina spongiosa TUCKERMAN, Genera Lichenum 38. 1872. 



Alaska (Funston, 12); St. Paul Island (Trelease, 1086). Col- 

 lected by Macoun on St. Paul and St. George Islands. 



