^;.| Stopes and Fuj ii. The nutritive relationa of the aurrounding tiaaoee etc. 



Ki^r. I. General diagram of thick pitted wall between egg cell and jacket eella. 

 Pita ..t |ai degree represent a whole group, or pitted area (cf. fig. 8. g>. 

 \\ ^lun tlus the wmII is irregularly thickened l; i \ i 1 1 l: pita of 2nd or more 



degreea; thia wall maj 1"' pierced by plaamodes o, arrowa b (cf. ng 2. t). 



Lrowa a repreaenl Plasmodesmen of final pH cloaing Lameila. (cf. fig. I. Z). 



Fig. 5. Zamia ftoridana. Small portion of egg cell and adjacent endosperm 



oella, Bhewing pitted wall and diatribution of starch and protein granulea. 



From microtome Beries, stained iodine. x240. 



,■ e gg ^-,-11 cytoplaam. 



z zone at edge of egg cell where minute starch grains lie very 



thickly. 

 t thick pitted wall. 

 j jacket felis, empty of starch. 

 en endosperm cells. with 8 starch graina, p protein grains. 

 Fig-. 6. Zamia ftoridana. Small portion of cytoplasm of egg cell, shewing 

 protein and starch grains. Kroin microtome series, stained with iodine. 

 x 2200. 



p protein granules of various sizes. sometimes very irregulär in shape. 

 8 groupa of minnte starch graina, apparently in plastid. 

 ss solitary starch grain in cytoplasm. 

 v usual vacnole. 

 Fig. 7. Ginkgo biloba. Low power drawing to shew relations of Archegonia 

 to atored Eood in surrounding endosperm. From microtome series. triple 

 stained. X 54. 



e egg cell with protein grains (represented by black dots). 



j jacket cells. 



d region of nearly empty cells round egg from which starch and 



protein has been dissolved. 

 s storage region of endosperm containing starch (pale rings) and 

 protein (black dots). 

 Fig. 8. Ginkgo biloba. Small portion from fig. 7. x 240. 



e egg cell, finely granulär with large protein granules p, cytoplasm 



slightly contracted away from jacket cells. 

 t thick pitted wall. 

 j jacket cells, with large nuclei and many very fine red staining 



granules in dense cytoplasm. 

 d endosperm cells empty of all stored food. 

 d' endosperm cells with small partly dissolved starch and protein 



grains. 

 s storage region with p protein and g starch grains. 



Fig. 9. Pinus Cembra. Small portion of cytoplasm of egg cell, betöre the 

 formation of digestive vacuoles. Shewing usual vacuoles and starch 

 grains in cytoplasm. From band section of fresh material stained iodine. 

 X350. 



s starch grains. v vacuoles. 

 Fig. 10. Pinus sylvestris. Small portion of cytoplasm of egg cell shewing 

 digestive vacuoles („Hofmeister Körperchen") with protein and starch 

 grains. From haud section of fresh material stained iodine. x 350. 

 d digestive vacuole. 

 p protein grains. s. starch grains. 



