Figs. 159-161. — Dioon ediile: fig. 159, embryo showing mucilage cavities (w/) and be- 

 ginning of suspensor; fig. 161, later stage, but with dcrmatogen not yet fully differen- 

 tiated; fig. 160, diagram with eml)ryo at the left a little more advanced than that in 

 fig. 15Q, and the one at the right, in the same stage as that in fig. 161. — After Cham- 

 berlain."" 



