To face p. 64. 



Puoc. Li.NN, Soc, Pr. 1. 



Tlie above table reproduces in graphic form the views expressed in the fore- 

 going paper. The unbroken vertical lines represent a])proxiinately the 

 geological records of the plant-groups in question, and the broken lines the 

 suggested phylogenetic connections between these groups. The distance apart 

 of the vertical lines from one another indicates roughly the supposed degree of 

 lateral relationsliip between the groups, wiiich are all supposed to have 

 originated from the Piei-idospernis. To the left of tiie Pteridospernious line are 

 siiown those (lymnospcrnis which are considered to have their cones primitively 

 nnisesual and aiieniopliilous, and to the right those wliich evolved on bisexual 

 (antiiostrobilale) lines and were primitively eutonio|)liilous. 



