RIDDLE: THE LICHENS OF BERMUDA 149 
17. ARTHONIA CONFERTA (Fée) Nyl. 
On tamarisk, Biological Station, E. G. B. 35; on Melia, hillside 
near Flatts, E. G. B. 52; on Melia, Tucker’s Town, E. G. B. 866; 
also, on Melia, Harrington Sound, Brown & Britton, 836; and 
without definite station, W. G. Farlow. 
As was pointed out by Willey (Synopsis of the Genus Arthonia 
12), this is the Arthonia atrata of the list in Hemsley’s Report, but 
not of Fée. 
18. ARTHONIA POLYMORPHA Ach. 
On bark, without definite station, Challenger Expedition, under 
the name Arthonia polymorphoides Nyl. apud Crombie (opus citi), 
but the characters are certainly not of specific value, as they were 
based entirely on the chemical reactions of the hymenium. 
I9. ARTHONIA RUBELLA (Fée) Nyl. 
On bark, Abbot’s Cliff, E. G. B. 924; Church Cave, £. GC. B, 
1082; without definite station, Challenger Expedition, under the 
name “‘var. inferiuscula Nyl.,” but the varietal characters given 
are not of sufficient importance. 
20. ARTHOTHELIUM SPECTABILE (Flot.) Mass. 
On Elaeodendron, without definite station, Brown, Britton & 
Seaver 1585. 
21. OPEGRAPHA ATRA Pers. 
On Cocolobis, Hungry Bay, E. G. B. 203 in part, a small form; 
on Conocarpus, without definite station, Brown, Britton & scant 
1211. 
22. OPEGRAPHA BONPLANDI Fée. 
On decorticated Juniperus, north of Hamilton, E. G. B. 69 
in part; on Randia, sand hills near Paget, E. G. B. 122; Churcs 
Cave, Brown & Britton, 1085; on dead Juniperus, St. David's 
Island, Brown, Britton & Bisset, 2080, and on Elaeodendron, 
Abbotsford, Brown, Britton & Bisset, 2110; on Juniperus, without 
definite station, Brown, Britton & Seaver, 1210, 1285. ; 
This species is as variable as it is common. No. 1085, ae 
olive-brown thallus and short apothecia, is the nearest to Fée's 
