NO. 3 dodge: lichens 35 



uary 17, 18, 30, 1934; W. R. Taylor No. 8yjh; Bartholomew Island 

 near San Salvador (James) Island, Galapagos Islands; January 23, 

 1934; W. R. Taylor No. 862; Islet, Gardner Bay (Gardner Island) 

 near Espafiola (Hood) Island, Galapagos Islands; January 31, 1934; 

 W. R. Taylor No. Syo; Tangola-Tangola Bay, Oaxaca, west coast of 

 Mexico; February 28— March 1, 1934; W. R. Taylor No. 892. 



The thallus becomes a very bright red with calcium hypochlorite 

 and the soralia remain uncolored. The specimen from Bartholomew 

 Island is smaller, rather more yellowish in color, and the soralia be- 

 come red, while the thallus is unchanged. Until more material is 

 available from the Pacific coast of tropical America and an opportu- 

 nity is afforded to compare material critically with the types of 

 species and varieties usually referred to R. Babingtonii, it seems 

 wiser not to describe it as new. 



Distribution: Darbishire reports this species from Valparaiso, 

 Chile, to California, and from Santo Domingo, Aruba and Curagao, 

 in the Caribbean. 



RoccELLA DEciPiENs Darb., Biblioth. Bot. 9:42. pi. 20, f. 92, pj, 

 1898. 



On rocks, Isabel Island, west coast of Mexico; March 3, 1934; 

 W. R. Taylor No. 896. 



Distribution: previously reported only from southern California. 



RoccELLA DiFFiciLis Darb., Biblioth. Bot. 9:49-50, pi. 19, f. 89. 

 1898. 



On rocks, high ground near shore, Albemarle Pt., Isabela (Albe- 

 marle) Island, Galapagos Islands; January 12, 1934; W. R. Taylor 

 No. 854. 



Distribution: reported from Pt. Loma, California, to Isla San 

 Lorenzo and Payta, Peru. 



RoccELLA PORTENTOSA (Mont.) Darb., Biblioth. Bot. 9:29-31. pi. 

 7-1 1, f. 27-41. 1898. 



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

 (Hood) Island, Galapagos Islands; January 31, 1934; W. R. Taylor 

 No. 871; Bartholomew Island near San Salvador (James) Island, 

 Galapagos Islands; January 23, 1934; W. R. Taylor No. 862a. 



Distribution: Chiloe and Coquimbo, Chile, to the Galapagos 

 Islands. 



