ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 521 



short zone where the divisions are differentiating divisions, giving rise 

 ultimately to two sorts of members, trichomes and flat or prismatic cells ; 

 (3) a more extended belt in which the cells of the second class again 

 undergo equating divisions and elongate ; (4) a region of matured and 

 fixed tissue, covering the greater part of the root. An epiblema with 

 such a complex history is characteristic also of wide ranges of fern- 

 allies and monocotyledons and of Nymphgeacese in dicotyledons. 



Stig-maria.* — H. S. Poole describes a specimen from the coal 

 measures at Stellaston, with an exceptionally well preserved internal 

 structure showing a large number of wedges of vascular tissue. Photo- 

 graphs and a description are given of the transverse section, which is 

 about 21 mm. thick. 



German Pteridophyta.t — C. Luerssen reports to the Commission on 

 the German Flora upon the literature published in 1899-1901 upon 

 Pteridophyta — 43 papers ; and gives a classified list of the new varieties, 

 forms, &c, and the new geographical records embodied in this literature. 



North American Pteridophyta— W. N. Clute and R. S. Cocks | 

 have drawn up an annotated list of 27 ferns and 8 fern-allies, gathered 

 in Louisiana, together with a short account of the collections which have 

 been made in the State, and of its climate and physical geography. 



A. A. Eaton § publishes his twelfth paper on the Equisetacese of 

 North America, treating of the sub-genus Hippochastas. A new species, 

 E. Funstoni, is described. 



E. C. Anthony || publishes some notes on the ferns of the east coast 

 of Florida, consisting chiefly of observations on the habitats, distribution, 

 and modes of growth of the species. 



Bryophyta. 



Ejection of Antherozoids. If — F. Cavers describes the explosive 

 discharge of antherozoids to a height of two inches by Fegatella conica 

 in bright sunshine, in case of naturally growing plants as well as of 

 laboratory cultures. He sketches the structure of the male receptacle, 

 its air-chambers, antheridial pits and cell-structure, and suggests an 

 explanation of the phenomenon. 



C. A. King ** observed the same process in case of laboratory 

 specimens in March 1901, and found that moisture alone (spraying the 

 plants) was sufficient inciting cause. He quotes G-. J. Peirce's obser- 

 vation of the same phenomenon in Asterella californica in 1902, the 

 antherozoids being projected to a height of 6 or 8 in. by the pressure 

 set up by increased turgidity of certain cells of the antheridium and its 

 support. 



T. Husnotft points out that this phenomenon in Fegatella was 

 described long ago by Thuret$| and recalled by Le Jolis in 1894. 



* Trans. Nova Scotian Inst. Sci., x. (1902) pp. 345-7 (2 pis.). 



+ Ber. Deutsoh. Bot. Ges., xx. (1903) Suppl, pp. 173-182. 



X Fern Bulletin, xi. (1903) pp. 1-5. § Tom. cit., pp. 7-12. 



|| Tom. cit., pp. 21-23. 



f Ann. Bot., xvii. (1903) pp. 270-74 (figs, in text). 



** Torreya; iii. (1903) pp. 60-1. tt Rev. Bryol., xsx (1903) p. 57. 



XX Mem. Soe. Sci. Cherbourg, iv. (1856) pp. 216-8. 



