Fig. 22. 
MR. W. GRIFFITH ON THE GENUS GNETUM. 311 
exserted portion of the tubular prolongation. The prolonged apex of the outer coat (a) is distinct, 
as well as the formation of the large yellowish fibres. The second coat (5) has become thicker 
towards its apex, and somewhat indurated. The inner or additional coat (c) is now adherent to 
the nucleus throughout the greater part of the extent of this latter organ. That part of it which 
corresponds to the constricted apex of the nucleus is thickened ; its prolongation is considerably 
dilated after it has passed through the narrow, and now cylindrical, tubular perforation of the 
second coat. The excavation is large, and its margins are rugged and more or less blackened. 
Vertical section of an ovule of G. scandens ; the nucleus is surrounded inferiorly by the two outer 
coats ; the notch on either side (a, a) indicates the place of separation of the additional (third) coat. 
The cavity is much enlarged, and occupied by a clavate body, of which the outline is given in 
- the adjoining figure 23. 
Fig. 25. 
Fig. 26. 
Fig. 27. 
Fig. 28. 
Fig. 29. 
Fig. 30. 
Fig. 31. 
Fig. 32. 
Fig. 33. 
Fig. 34. 
Body occupying the nucleary cavity ; this is the rudiment of that which subsequently becomes 
the very copious fleshy albumen. 
Vertical section of a full-grown fruit of G. apiculatum, in which, however, no embryo had been 
developed: a. outer baccate coat, the inner half of which is composed of very large fibres ; 
these are of a yellowish colour, shining appearance, and imbedded in a reddish-yellow pulp ; 
b, b. drupaceous covering; c, €, c. inner or additional coat, with its woody, fragile, enclosed and 
prolonged apex (to this the fourth coat adheres firmly, except at its sphacelated apex, d); 
e. albumen, now copious and fleshy, by the great development of which the original nucleus has 
become reduced to a thin membrane, of which the free apex is seen at d; f. excavation at the 
apex of the albumen occupied by broken-up tortuous tissue, the rudiments of a funiculus. The 
direction of the subsequently-extended excavation may be traced lower down, and is indicated by 
a greater density of texture than occurs elsewhere. 
Albumen of the same detached, viewed on its entire surface : at d. is seen the apex of the nucleary 
membrane with its sphacelated apiculus. 
Vertical section of the same, showing the cap which the adhering apex of the fourth or nucleary 
membrane makes for it. The tortuous tissue is visible in the cavity. 
Tas. LVI. 
Considerably advanced ovule of G. Brunonianum ; vertical section. 
Vertical ender of a mature and, with the exception of the embryo, "d : - ead 
dens: a, a, a. the outer coat, which has become pulpy and baccate, m lying rear LA fe 
the pulp; it is perforated by the prolonged persistent apex of ME es x Dan de 
second or drupaceous coat, shown to consist of two layers = eee: deg Ed (RES 
third membrane, composed of the additional and nuclear mem ge : dn bien. and 
at their apices,—the apex of the nucleary membrane always separating with 
: > Er ; e. the central apical cavity, empty. 
ng Ge e NE : sse a. outer coat; 5. second coat; c. nucleary 
Vertical section of an immature seed of G. apiculatum m 
membrane of albumen ; d. albumen ; e. sphacelated apex of albumen ; f. apical cavity; g- 
suspensor lodged in ditto. : 
Tortuous suspensor (g) in fig. 29 extracted and highly magnified. 
Vertical section of the separated albumen of a similar seed. 
Vertical section of the albumen with its cellular attachment ; 
lateral attachment, : 3 MR 
Embryo and funiculus extracted and highly magnified, showing the ey sqm apt 
Embryo with the apex of the funiculus ; the cotyledons are seen 
equal. 
showing the embryo in situ and its 
