Anatomie. — Biologie. 5 



•of the internal phloem, and at the Ieaf-gap it becomes conti- 

 nuous with the general gronnd tissue of the stem. 



The authors suggest that this type of stele presents a 

 structure intermediate between monostely and solenostely, and 

 that it may have arisen from the former by the downward ex- 

 tension of the phloem that lies in the bay of the meristele of 

 the leaf. Further, if this Strand of ground tissue, which is con- 

 fined to the neighbourhood of the node, were to reach down 

 so as to meet with that of the node below a solenostelic struc- 

 ture would thus be attained. The structure of the nodes of 

 certain Gleicheniaceae is referred to as indicating the possi- 

 bility of such changes taking place. D. J. Gwynne-Vaughan. 



Hill, T. G., On secondary thickening in Angiopteris 

 evecta. (Annais of Botany. Vol. XVI. No. LXI. p. 173.) 



The author is engaged upon the investigation of certain 

 Marattiaceae, and he finds that in the steles of the above plant 

 there is a tissue lying between the xylem and the phloem 

 which owes its existence to the presence of post-embryonic 

 meristematic activity, in fact to the occurrence of a cambium. 



D. J. Gwynne-Vaughan. 



BOODLE, L. A., On Iignification in the phloem oiHelian- 

 thus anmiiis. Annais of Botany. Vol. XVI. No. 61. p. 180.) 



The author has observed that the walls of many of the 

 sieve-tubes and companion cells in old stems of the Sunflower 

 become completely lignified and give reactions similar to those 

 of the xylem elements; also that even the contents of some of 

 the sieve-tubes and companion cells, chiefly those in which the 

 Iignification of the walls is just beginning, give reactions indi- 

 cating the presence of lignin. D. T. Gwynne-Vaughan. 



Gwynne-Vaughan, D., T., On an unexplained point in the 

 anatomy of Helmuithostachys Zeylanica. (Annais of 

 Botany. Vol. XVI. No. 61. p. 170.) 



This note describes the occurence of certain narrow pas- 

 sages or canals in the rhizome of the above plant running 

 through the cortex from the stele to the external surface; and 

 also certain modifications of the stele related to the presence 

 of these canals. D. T. Gwynne-Vaughan. 



Anonymus. 1902. The dissemination of seeds by natural 

 means. (Agricultural Bulletin of the Straits and Federated 

 Malay States. Vol. I. p. 153—156.) 



The seeds of species of Palaquium are enclosed, 1 or 2 

 (rarely 3 or 4) together, in a sweet edible pulp which is eaten 

 by birds and especially by bats. The author believes that Bats 

 are the principal agents in the seed-distribution. Whether the 



