NOTES OX DIPTEEOCAEPS. 65 



Eetinodendron cotyledons an claret in colour. Figures 84 and 

 85 present a case of twin seeds. Apparently they arose from the 

 ovules of one loculus for the placentar cotyledon of the seed re- 

 presented above is turned away from the seed represented below; 

 this cotyledon is folded normally ; but under the unusual pressure 

 the outer cotyledon has taken on an S-curvature such as has been 

 recorded for the genus Dlpterocarpus. The cotyledons of the lesser 

 seed are packed in an X-form each partly above and partly below. 

 The better to show this they have been drawn in figure 85 slightly 

 apart. Figure 96 shows the cotyledons of another abnormal seed 

 wherein there had been a similar packing of the lobes : two such 

 cases were observed. 



Figure 96, cotyledons of an abnormal seedling of Retinodendron pallidum in 

 which each had been packed partly above and partly below the other, \ nac. size. 



AxiSOPTEBA. 



The embryo and seedling of Anisoptera costata were described 

 in this Journal X/o. To. 191 T. pp. 43-48. The observations here to 

 be recorded were made upon another species, A. Curtisii, King, 

 frequent in Penang island. Figure 97 is its embryo seen with the 

 radicle away from the observer. Figures 98. 99 and 100 are suc- 

 cessive stages in its germination. Figure 101 is a seedling with its 

 false whorl of four leaves. These four leaves obviously represent 

 a pair with two others drawn into a whorl with them : the condi- 

 tion is the limit of approximation of the leaves which follow 

 the pair as in DryobaJanofis aromatica and the Hopeas of the section 

 Dryobalanoides. But so thoroughly have these following leaves 

 been incorporated into a whorl with the pair that they are not 

 recognisable constantly by size and one of them quite commonly 

 exceeds in its length one of the leaves of the pair. To this state I 

 called attention in describing the seedling of Anisoptera costata. 

 without then having the key to the origin as given by the examina- 

 tion of the germination of Dryobalanops and Ho pea. 



R. A. Soc, No. 81, 1920. 



