281 



reminds iis of Ihc assiinilalois in many CJiordariaccuc, and llic 

 Ihnlliis is ralher like Leathesia in slriu-lure, Ihc slar-shaped medul- 

 lary cells also occuriing in Sj)l(uluu(liiun. 11 is Irue Ihal llie 

 malure slruclure is similar lo Ihe slriulure ol" Fiicus, bul Ihe mode 

 of growlli is enlirely dislincl. 



The apical cell. 



This myslcrioiis body has l)cen tlescrihed hy Mitchki.l and 

 Whitting and was especially sliidied hy Hok. In ihe young api- 



Fig. 2. Lengtli section of old frond, X 15. 



cal zone we lind a varying number of pear-shaped bodies, pro 

 longed inlo a narrow lail which is sluck belween Ihe normal 

 cells and generally reaches Ihe cavily below Ihe corlex. They 

 show no connection at all wilh olher cells and dilTer from Ihem 

 not only in shape hut also by Ihe very Ihick cell wall. They do 

 not take part in Ihe formation of tissue. They are also found in 

 the conceplacles. According lo Mitchell and Whitting the appear - 



