EVOLUTIONARY TENDENCIES AMONG GYMNOSPERMS 409 



so far as the records are available, and are so connected by intergrad- 

 ing (or rather anastomosing) forms that their relationship seems 



h//ca/e 



ca/ei 



T 



mill 



=1 



C'/nkgo 



a/ei 



^ 



Con ilt 



oni eraie.i 



It. 





J S ii s s J- 



- -. .^ «. J^pj. 





Cyca^a/es 



knntltit- 

 alcs 



Gnetak 



^ 



ti R ti 



lunan 



Or}. 



mician 



Camut 



nan 



Fig. 461. — A more detailed diagrammatic presentation of the connections sug- 

 gested in fig. 460. — Prepared by Sister Helex Angela. 



evident. The Cycadofilicales are so fernlike in every feature except 

 their seeds, that their derivation from some ancient fern stock 



