:Smithsonian Report, 1896. 



Plate XXII. 



1. Dischidia sp. — Longitudinal section of an 

 ascidium. (Delpino.) 



Conchophyllum sp. — Portion of a branch viewed 

 from its inferior aspect. (Delpino.) 



3. Tococa bidlifera. — Transverse section of the lodging bursa 



Biologic Relations of Plants and Ants. 



