Tolacf y. SI.] 



>*%.,')t. 



■>M' 





Fig. 65CI. — A PllOTdMK RddRAI'H SHOWINC TWO RkSIN-CANALS IN THE 



Wood or I'miix. Note also the shape of the ti-aeheides in transverse 

 section, and tlie medullary rays lying close to botli canals. 



