. La cyclopaedia d'anatomie et physiologie. Anatomie ; physiologie ; Zoologie. Diagramme du récipient d'Geaster fimbriatus. Le noyau, a, est entouré de ses mem- brane réticulaire, qui est indiqué par l'intérieur des deux lignes doubles. La double ligne extérieure correspond à la couche externe résistante de l'peridinm. L'espace intermédiaire, 6, est occupé par un tissu délicat de cellules sphériques. En c, toutes ces structures sont continus, aussi bien avec l'autre ainsi qu'avec le mycélium à partir de laquelle l'ensemble de l'ori- ginates. solide, mais lorsqu'il est complètement développé, présente de nombreuses cavités irrégulières, ce qui ar

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. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Diagram of receptacle of Geaster fimbriatus. The kernel, a, is surrounded by its reticular mem- brane, which is indicated by the inner of the two double lines. The outer double line corresponds to the resistant external layer of the peridinm. The intervening space, 6, is occupied by a delicate tissue of spherical cells. At c, all these struc- tures are continuous, as well with each other as with the mycelium from which the whole ori- ginates. solid, but when fully developed, presents numerous irregular cavities, which are scat- tered through its substance. It is entirely composed, when in the solid condition, of delicate filaments similar to those of mycelium, the arrangement of which is as follows :—The superficial filaments are closely woven toge- ther, so as to form a delicate reticular mem- brane, which invests the whole kernel, and from the inner aspect of which a second and very numerous set of filaments passes off towards the centre. It is of these, or of their ramifications, that the corky, semi-elastic sub- stance of the kernel is entirely formed. If we examine the cavities which have been men- tioned as existing in the fully developed con- dition, we find that they are furnished with a Fig. 144.. Section of a port ion of t/te young receptacle of Geaster nifascens, about 100 diam. The section has passed through one of the cavi- ties, and shows the arrangement of the basidia which form its lining membrane. Some of these bear spores on their summits. more or less continuous lining of basidia, bear- ing spores on their summits. These basidia have been shown, by careful observation, to Supp. 225 be in fact the swollen terminations of the centripetal branching filaments above men- tioned. The peridium it is less necessary to describe, as it has no immediate connection with the spore-bearing organs. It consists of an internal and an external layer, the latter being smooth and very resist

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