Bryophyten. — Pteridophyten. 387 



344 species and numerous varieties. In an introductory note the 

 author gives a sketch of the geology and physical geography of the 

 county, a brief account of the principal bryologists who have col- 

 lected in Sussex, and a list of papers in which previous records 

 have been published. Nearly all the species in the present enume- 

 ration have been actually observed in the field by Nicholson himself 

 during the past 15 years. He adds a list of 15 more species which 

 have been found just outside the limits of the county and may 

 reasonably be expected to occur in Sussex itself. A. Gepp. 



Russell, T. H., Mosses and Liverworts. An introduction to 

 their study, with hints as to their collection and preser- 

 vation. (London, Sampson Low^, Marston & Company, Ld. 1908. 

 XIII 200 pp. 11 plates.) 



The author having written this book mainly for beginners, 

 gives an account of some of the more generally interesting facts 

 concerning the mosses and hepatics with a sketch of their life- 

 history and various modes of reproduction. He then discusses me- 

 thods of collection, examination and preservation of specimens, 

 describing the most appropriate apparatus to use and how to make 

 it, and giving explicit instructions for the preparation of microscope 

 slides, with hints as to how the many pitfalls that beset the be- 

 ninner may be avoided. A. Gepp. 



Stirton, J., Scottish Mosses. (Proceedings of the royal philoso- 

 phical Society of Glasgow. XXXVIII. p. 150—158. 1907.) 



The author gives an account of some mosses collected mostly 

 at or near Arisaig in the West of Scotland. Some of these are 

 interesting because of their rarity; and eleven species and one va- 

 riety are new to science and are described, their names being as 

 follows: Dicranutn leiophyllum, Trichostomum episemum, Barbiila 

 Imiosella, Schistidinm nodulosum, Grimmia polita, Rhacoynitrium 

 consocianSj R. divergens, Bartramia subvirella, Pohlia tenerrima, 

 Oligotrichum exigiaun, 0. hercynicum var. fastigiatum, Hypnum 

 teichophyllum. Of these only the Dicraniint and Hypmim were found 

 with fruit. Fruiting specimens of Ulota phyllantha and U. scotica 

 were found at three localities near Arisaig. Plentifully as U. phyl- 

 lantha grows in parts of north-western Europa and of North 

 America, probably not more than a dozen of its capsules had ever 

 been gathered previously; further -the fruit of it is never found 

 except where the plant grows intermingled with U. Bruchii in a 

 fertile State. Other rare species of the collection are Barbula limosa, 

 B. exiguella, B. icmadophila, Hypnum corrugatulum, H. canariense. 



A. Gepp. 



Saxelby, E. M., The Origin of the Roots in Lycopodium Selago. 

 (Ann. of Bot. XXII. N«. 85. p. 21. 1908.) 



The roots arise near the apex of the stem below the youngest 

 leaves and opposite to the phloem Strands of the stem style. The 

 xylem of each root is connected up with two or even three of 

 the protoxylem Strands of the stem, never with one only. The apex 

 of the root grows by three meristematic regions, plerome, periblem 

 and dermatogen; the latter giving rise to the root-cap. The derma- 



