BRITTON AND ROSE 



PLATE X 





^W:? 



w^Avt*.3fe 



/a 







*f 



k v 



M. E. Eaton del. 1. 4. 5 

 Kako Morita del . 2, 3 



1. Joiut of Opuntia tunicata. 2 to 5. Joints of Opuntia spinosior. 



(All natural size.) 



