ZOOLOGY AND BOTANY. MI0RO8COPY, ETC. 785 



and histological subjects, and 289 slides wliicli for convenience may be 

 classed under Varia. This gives a full total of 4429 slides. Prof, do 

 Bary's researches into the life-histories of Fungi, Conjugatae, the anatomy 

 of Vascular Plants, &c., are so well known to be of fundamental import- 

 ance, that students of Botany in this country may be congratulated on 

 having access to the authentic material used by the late distinguished 

 botanist in his work. 



Cryptogam.ia Vascularia. 



Antherozoids of Vascular Cryptogams.* — From observations made 

 chiefly on Ferns {^Pteris, Gymnogramme, Aneimia) and Equisetace£e, 

 Herr W. Belajeff supports the conclusion previously arrived at by others, 

 that in all Vascular Cryptogams the body of the antherozoid is an achro- 

 matic ribbon, in which a chromatin-filament or body is inclosed. Tlie 

 chromatin-body is in all cases derived from the nucleus of the mother- 

 cell, the cilia and the so-called vesicle from the cell-protoplasm. 



Sporocarp of Pilularia.j — M. Meunier has followed out in detail the 

 development of the sporocarp of PiluJaria globulifera, which he finds to 

 agree with the account given by Goebel and Juranyi, except that he was 

 unable to detect in the youngest conditions examined any connection 

 with the leaf. Its vascular bundle apjiears, on the contrary, to spring 

 directly from the cauline bundle. He agrees with Juranyi in regarding 

 the sporocarp as corresponding to four divisions of the leaf, rather than 

 with Goebel, who looks upon it as representing a single division only. 

 He describes, moreover, the development of the peculiar refringent pris- 

 matic layer of cells beneath the epiderm of the sporocarp. The appear- 

 ance is due to a continuous layer of albuminoid granules on the lateral 

 walls of these cells, which become inclosed in the cell-wall when this 

 increases in thickness. The development of the envelope of the spores 

 out of the protoplasm which surrounds them differs in some respects from 

 that described by Strasburger in the case of Marsilia. 



Endoderm of the Stem of Selaginellacese.J — In the stem of Sela- 

 ginella no definite endoderm has at present been described. M. Leclerc 

 du Sablon finds one in the species examined, S. hortensis, insequalifolia, 

 caulescens, and triangularis, but in a position diff'erent from that in which 

 it is ordinarily found. The cells of the trabecules have a suberized 

 framework, and this constitutes the endoderm ; this framework is slightly 

 thickened, but does not generally exhibit plication. The external 

 layer of the central cylinder is the pericycle, in direct contact with the 

 liber. The cells of the endoderm are therefore, in Selaginella, com- 

 pletely isolated from one another, and cannot perform their ordinary 

 mechanical function. 



Root of the Filicme8e.§ — M. A. Trecul gives the following reasons 

 in favour of his opinion on the radicular nature of the stolons of Nephro- 

 lepis, in reply to the views of Lachmann and Van Tieghem : || — (1) The 

 different arrangement of the bundles in the mother-stem, and in the 

 stolons ; they are disposed round the pith in the stem, while they form a 



* Ber. Deutsch. Bot. Gesell., vii. (1889) pp. 122-5. Cf. thi.s Journal, ante, p. 552. 

 t ' La Pilulaire,' Lonvaio, 83 pp. and 6 pis. See Bot. Ztg., xlvii. (1889) p. 592. 

 i Journ. de Bot. (Morot), iii. (1889) pp. 207-8 (1 li^.). 



§ Comi^tes Reiidus, cviii. (1889) pp. 1288-91. 1| Cf. this JourmJ, 1885, p. 1033. 

 1889. 3 I 



