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 576 ON THE PLURALITY AND DEVELOPMENT, ETC.

Fig. 4. A plan rather than actual representation of a longitudinal section of any one seed examined, but the parts accurately copied from the calyptrffiforni membranes, the funiculi or suspensors, and the nascent embryos of seeds of Pi?ius sylvestris. In this stage the funiculi are distinct from the calyptrseform membranes within which they originated.

Fig. 5 is also a plan of the sliglitly concave apex of the amnios or albumen, with its semitransparent points or pores circularly arranged ; in this species {Pinus sylvestris) seldom exceeding live, and not unfrequently being only four or even three.

Fig. 6. One of the funiculi or suspensors, with its dilated upper extremity, to which the lacerated remains of a thin transparent membrane adhere : the funiculus itself ramified, each of the two lateral branches consisting of a single elongated tube or cell terminating in a rudimentary embryo : the trunk of the funiculus composed of several (apparently four) tubes or cells terminated by a single embryo, which is already slightly divided, the divisions being the com- mencement of its cotyledons.

Figs. 7 & 8. Two other funiculi belonging to the same seed less advanced, but both ramified.

Fig. 9. A funiculus of Pinus Pinaster with its thickened head, in which the nuclei of its component elongated cells or tubes, and its adhering lacerated membrane are visible. The figure is given particularly to show that in this (the only one observed) there is no opake granular portion of the compound funiculus; in other words, no indication of a nascent embryo.

Fig. 10. A funiculus of Pinus Abies, Linn., with its rudimentary embryo and thickened head, still partly inclosed in the calyptrseform membrane.

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