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374 



SIR J. LUBBOCK PnrTOBIOLOGICAL OBSEKA^ATIONS 



to occupy tlie whole space, are longitudinally folded (fig. 87), 

 thus giving rise'to the crenations on the margin. 



Fig. 87. 



Embi-yo of Cordia subcordaia, X 2. 



Acctnjihoit and Inciiinhent Cotyledons. 



There are two ways in Avhich the radicle may be bent over the 

 cotyledon. 



Sometimes It is turned up over the "back of one of the coty- 

 ledons, as in figs. 88 and 89, and is ?aid to he incumbent; while 

 sometimes it is turned along the edge of the cotyledons, as in 

 figs. 90 and 91, which are then termed accumbent. The divi:=ioi]S 



Fig. 88. 



Fig. 89, 



Figs. 88 and 89. Sections of seed of TI(.^j)eris onaironalis, X 10 



V, hollow in testa. "^ 



Fig. 91 



Fiff. 90. 



Figs. 90 and 91. Section of seed of Clmrantlnis Cheiri, X 10. 



o£ the Ci'ucifera^ are based to some extent on this character, some 

 groups being accumbent and some incumbent I puzzled for 

 some time over the reasons which could account for this differ- 



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