PALAEOZOIC CONE-GENUS LEPIDOSTEOBUS 



229 



Text-fig. 4 



A 



,P^ 



.l.t. 



Portions of xylem ring of Lepidostrohus oldhamius , Will., f . pihsu^, from three successive 



passing through the same cone axis at different leyels. ( x 387.) 



A. Section near cone apex ; only the protoxylem is developed. U. C. L. Coll., C 16, h. 



B. Section further from apex ; metaxylem is beginning to appear. U. C. L. Coll., C. 16. h. 



C. Section still farther 



V. C. L. CoZZ., C.in. a. 



('ma'.=metaxylem; pa?.=protoxylemj Z./.=8porophyll trace.) 



SECOND SERIES. — BOTANY, VOL. VIII. 



2m 



