74 
CUMMINGS 
Dr. Nylander records it as growing on earth and moss on St. Law¬ 
rence Island; Dr. Rothrock and J. M. Macoun record its occurrence, 
but give no localities. The specimen from St. Matthew Island is 
fruited, the others are sterile. 
The genus Siphula was not found among the Harriman collections, 
but Siphula dactyliza Nyl. and S. ceratites (Wahl.) Tr. are re¬ 
ported by Dr. Nylander as growing on quartz rock on St. Lawrence 
Island, the latter species also on moss associated with Lecidca subal- 
linita Nyl. In Tuckerman’s Genera Lichenum S. ceratites is cred¬ 
ited to Bering Strait (Mr. Wright), the only American locality given 
for it. 
Family ARTHONIACEiE. 
ARTHONIA. 
9. Arthonia punctiformis Ach. 
Arthoniapunctiformis Acharius, L. U. 141. 1810. 
Sitka (Trelease, 839). New to Alaska. 
Growing on Alnus oregana. Spores 2-3-4-septate. Thallus not 
uniform, and thus varying from most of the specimens in the Tucker- 
man Herbarium. A widely distributed species. 
Arthonia mediella alnicola Nyl. is reported by Dr. Nylander as 
having been collected on branches at Port Clarence. 
Family OPEGRAPHIACEiE. 
GRAPHIS. 
10. Graphis scripta (L.) Ach. 
Lichen scriptus Linnaeus, Spec. PI. ed. 2. 2 : 1606. 1764. 
Graphis scripta Acharius, L. U. 265. 1810. —Sowerby, Eng. Bot. t.iSij. 
Orca (Trelease, 1801). New to Alaska. 
Growing on the bark of dead coniferous trees. Reported from 
Newfoundland by Arnold, but I find no record of its occurrence in 
Greenland. 
No. 811, collected at Sitka by Trelease, is evidently a Graphis. 
Unfortunately the spores are not developed, and therefore it is impos¬ 
sible to place it. Apparently it belongs in the section Fissurina, 
which is characteristically tropical. 
XYLOGRAPHA. 
11. Xylographa opegraphella Nyl. 
Xylographa opegraphella Nylander, Enum. Lich. 128. 1857. 
Alaska (Trelease, number lost). On dead wood with Lecidea 
enteroleuca and Placodium ferrugineum. 
