JOURNAL OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATE XXV, 



Illustrating Mr. Bower's Paper on " The Germination 

 and Embryogeny of Gnetum Gnemon." 



All the figures, except 1, 15, 16, 17, 18, 23, 24, and 25, were traced 

 with camera iucida. 



Key to Lettering. 



a. = apical cell ; ap. = apical cone ; b. sh. = bundle sheath ; c. = coty- 

 ledon ; cot, bun. = cotyledonary bundle ; /. = feeder ; hi/, st. =^ hypo- 

 cotyledonary stem ; lat. = latex ; I. rt. = lateral root ; pi. I. = plumular 

 leaf; pr.ph. := primary phloem; pi. st. := plumular stem; pr. xi/. ■=■ 

 primary xylem ; /•. = radicle ; rt, = root ; s. = suspensor. 



d Species of Gnettimfrom Chittac/07ig . 



Fig. 1 ( X 4). — Groups of suspensors from the cavity in the endosperm. 

 Fig. 2 (X 70). — Single suspensory tube from the same. 



Gnetum Gnemon. 



Fig. 3 (x 175). — Young embryo, external view. 



Fig. 4 (x 175). — Young embryo, optical section. 



Fig. 5 (x 175). — Embryo, optical section. 



Fig. 6 (x 175). — Young embryo in situ, external view. 



Fig. 7 (x 175).— Ditto. 



Fig. 8 (x 175). — Older embryo, longitudinal section. 



Fig. 9(x 175). — Older embryo, longitudinal section, the peripheral cells 



near the apex dividing both parallel and perpendicular to the surface. 

 Figs. 10 — 12 (x 20). — Older embryos in longitudinal section, showing 



the development of the feeder. 

 Fig. 13 (x 325). — Apex of young embryo, before the development of the 



feeder. 

 Fig. 14 (x 175). — Apex of stem, from an old plant: the first divisions 



preparatory to the formation of the glands may be seen in the young 



leaf. 

 Fig. 15 ( X 2). — Embryo before protrusion of the radicle. 



Fig. 16 (x 5). — Longitudinal section of feeder: abnormal case, showing 



the effect of pressure on its apex. 

 Fig. 17 (x about 1^).— Seedling after the hypocotyledonary stem has 



left the seed. 

 Fig. 18 (nat. size). — Seedling, ten days above ground. 



