268 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



EXPLANATION OF PLATE IX 



Photographed by E. W. Gifford 



Fig. 1. Opuntia insularis Stewart, specimen from Tagus Cove, Albemarle 

 Island. 



Fig. 2. Opuntia galapageia Hensl., mature specimen from Hood Island 

 with closely arranged branches. 



