ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 673 



would be entirely in agreement with their apparently centripetal 

 development and in particular with their cauline course. 



Mosses. 



Leaf-Anatomy of the Leucobryacese.* — J. Oardot publishes the 

 results of his researches into the anatomy of the LeucobryaceiB and 

 illustrates them with 19 plates containing abundant sketches of leaf 

 sections. The transverse section of the leaf is an all-important cha- 

 racter of both species and genus. It varies according to the height at 

 which it is taken in a given leaf, but this variation is constant in a 

 given species, and hence is of systematic importance. The author 

 claims that he has put our knowledge of the leaf-structure on a firmer 

 footing ; that Lindberg's view that the leaf of Leucobryum is chiefly 

 composed of an expanded nerve is correct ; that the affinities of the 

 Leucobryacefe are with the Dicranaceoe on the one hand and with Syr- 

 rhopodon on the other ; that the anatomical characters of the leaf afford 

 natural and satisfactory means for discriminating the genera. He 

 divides his subject into four tribes : — Leucobryefe, Leucophaueae, Octo- 

 blephareee, Arthroeormeae — according to the elements composing the 

 cross-sections of the leaves ; and the genera comprised are : — I. Ochro- 

 bryum, Schistomitrium, Gladopodanthus, Leucobryum ; II. Leucophanes ; 

 III. Cardotia, Octoblepliarum ; IV. Arthrocormus, Exodictyon. 



British Moss Flora. f — W. E. Nicholson notes the occurrence in 

 Britain (near Crowborouuh in Sussex, and Bedgbury Park Woods, Kent) 

 of Ephemerum stellatum, a moss hitherto known only from France. The 

 author gives a description and figure, and refers to the species as 

 " perhaps the smallest of all British mosses." 



Mosses of Jutland. £ — A. Mentz discusses the nature and composi- 

 tion of the moss vegetation of the heaths and bogs of Jutland. The 

 paper is in Danish. A bibliography is appended. 



European Species of Sematophyllum.§ — Elizabeth G. Britton dis- 

 cusses the synonymy of this genus, its European species, and the 

 geographical distribution of the latter. 



Preliminary List of Montana Mosses.|| — R. S. Williams gives a 

 list of species collected between 1886 and 1897 in various portions of 

 the State chiefly in the Missouri watershed. A new species of Dicranum 

 and of Barbula are described. 



Species Hepaticarum.^f — F. Stephani resumes his revision of the 

 hepatics of the world by issuing the first half of the difficult genus 

 Plagiochila. In an introduction he discusses the importance of the 

 leaves and especially of the leaf-base as characters in the classification 

 of the species. Coming to the species, he enumerates and classifies 



* Mem. Soc. Nat. des Sci. Nat. et Math, de Cherbourg, xxxii. (1901-2) pp. 1-84 

 (19 pis.). 



t Journ. Bot., xl. (1902) pp. 337-8 (1 pi.). 



X Bot. Tidsskr., xxiv. (1902) pp. 303-22 (5 figs in text). 



§ Journ. Bot., xl. (1902) pp. 353-5. 



|| Bull. New York. Bot. Gard., ii. (1902) pp. 351-80 (6 pis.). 



t Bull. Herb. Boiss., ii. (1902) pp. 657-88 (with 6 figs, in text). 



December 17th, 1902 2 z 



