36 THE HANCOCK PACIFIC EXPEDITIONS VOL. 3 



ROCCELLA Sp. 



On trees, Tenacatita Bay, Jalisco, west coast of Mexico; March 2, 

 1934; W.R. Taylor No. 902. 



This sterile fragment may be referable to R. Babingtonii. It ap- 

 pears to be a broken thallus which is regenerating. 



Thelotremaceae 



Leptotrema mastoideum Miill. Arg., Flora 70:400. 1887. 

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

 January 1934; W. R. Taylor No. goj. 



Distribution: Originally described from Paraguay. 



Leptotrema sp. 



On rock with Caloplaca Muelleri (Vainio) Zahlbr., Islet, Gardner 

 Bay (Gardner Island) near Espanola (Hood) Island, Galapagos Is- 

 lands; January 31, 1934; W. R. Taylor No. 874J. 



Too immature for certain determination. 



COENOGONIACEAE 



CoENOGONiuM suBviREScENs Nyl., Flora 57:72. 1874. 



Trunks of living trees in forest, Barro Colorado Island, Gatun 

 Lake, Canal Zone; February 17, 1934; W. R. Taylor No. 881. 



Distribution: common at low elevations in the rain forests of trop- 

 ical America. 



COLLEMACEAE 



Leptogium azureum (Sw.) Mont. ap. Webb., Hist. Nat. lies 

 Canaries 3 (1):129. 1840. 



Gorgona Island off Marino, west coast of Colombia; February 12, 

 1934; W. R. Taylor No. 8y6; Cabita Bay, Cape Corrientes, Choco, 

 west coast of Colombia; February 13, 1934; W . R. Taylor No. 904.. 



Distribution: common in rain forest at lower elevations throughout 

 tropical America. 



Leptogium denticulatum Nyl., Ann. Sci. Nat. Bot. V. 7:302. 

 1867. 



Growing over hepatics, Cabita Bay, Cape Corrientes, Choco, west 

 coast of Colombia; February 13, 1934; W. R. Taylor No. 878. 



Distribution: this or closely related species and varieties are com- 

 mon in the rain forest at lower elevations throughout tropical Amer- 

 ica. 



