34 THE HANCOCK PACIFIC EXPEDITIONS VOL. 3 



species being represented by a fragment unintentionally collected with 

 another species. Some of the fragments of rock have half a dozen 

 species in various stages of development, intimately intermingled. 

 Some of these seem to be species recently and excellently described 

 by Malme, but material has not been available for comparison. Only 

 more field experience and careful monographing of these difficult 

 genera can show whether some of the specimens cited below are 

 correctly referred. 



Dermatocarpaceae 



PsoROGLAENA cuBENsis Miill. Arg., Flora 74:381. 1891. 



On rock, Islet, Gardner Bay (Gardner Island) near Espanola 

 (Hood) Island (cf. Stewart, 1912), Galapagos Islands; January 31, 

 1934; W. R. Taylor No. 872. 



This microthalline species might be easily overlooked as very 

 young thalli since the thallus is scarcely larger than apothecia of 

 some saxicolous lichens. 



Distribution: previously reported only from Cuba. 



Graph iDACEAE 



Three sterile fragments evidently belong to this family but more 

 certain determination is impossible at present. 



On shrub (?) near Black Beach Anchorage, Santa Maria (Charles 

 or Floreana) Island, Galapagos Islands; January 17, 18, 30, 1934; 

 W . R. Taylor No. 8j6; (2 fragments) Port Utria, Choco, west coast 

 of Colombia; February 15, 1934; W. R. Taylor No. 



Chiodectonaceae 



Chiodecton sanguineum (Sw.) Vainio, Acta Soc. pro Fauna Flora 

 Fenn. 7 (2): 143. 1890 [often cited fitude Lich. Bresil. These Univ. 

 Helsingfors 2:143. 1890]. 



Inland trail, Santa Maria (Charles or Floreana) Island, Galapagos 

 Islands; January 1934; W. R. Taylor No. poi. 



Distribution: ubiquitous in the lower elevations in the American 

 tropics. 



ROCCELLACEAE 



RoccELLA Babingtonii Mont., Ann. Sci. Nat. Bot. III. 18:305. 

 1852. 



On trees. Black Beach Anchorage, and inland near Wittmer place, 

 Santa Maria (Charles or Floreana) Island, Galapagos Islands; Jan- 



