330 SUMMARY OF CURRENT RESEARCHES RELATING TO 



year's " Revue Bryologique," for the benefit of the subscribers of that 

 periodical. It treats of the moss-flora of the whole world. 



Twin Capsules in Mosses.* — I. GyorflFy describes and figures an 

 instance of twin capsules arising on one seta in PJagiohryum demissum 

 Lindb. This phenomenon has been noted previously for other species, 

 but not hitherto for F. demissum. The author found it on the 

 Stierberg, in the Hohe Tatra. He gives a description of the plant, 

 and agrees with Leitgeb in considering that in these cases the one 

 sporangium has been, as it were, split off from the other. He gives a 

 list of localities where he has found F. demissum in the Hohe Tatra. 

 An instance of a double capsule is also recorded in Folijtrichum juni- 

 per inum ; in that case, however, the tv>-o capsules have each their separate 

 seta, but are covered with a common calyptra. In both these instances, 

 the double capsule arises from a single egg-cell. 



European Hepaticas.f — K. Miiller issues the third fascicle of his 

 monograph of the Hepaticge in Rabenhorst's " Kryptogamen-flora." 

 He brings to an end the introductory remarks which occupied the 

 first two fascicles, adding a Hst of the more important published sets 

 (exsiccatge) of European Hepaticae, with their dates, etc. This is 

 followed by a list of the herbaria of the principal deceased experts in 

 hepaticology, with information as to where these herbaria are preserved. 

 In discussing the systematic arrangement of the hepatics, he briefly 

 states the main divisions of the group adopted by previous authors ; 

 and contrasts in tabulated form the systems employed in Gottsche, 

 Lindenberg, and Nee's "Synopsis Hepaticarum " (1844), Lindberg's 

 " Hepatica3 in Hibernia lectae " (1875), and Leitgeb's " Untersuch- 

 ungen tiber die Lebermoose " (1874-81). In introducing his own 

 systematic treatment as followed throughout the present work, he 

 declares his preference for condensed rather than exhaustive diagnoses. 

 Beginning with the sub-class Marchantiales, he gives a key to the 

 genera of RicciaceaB, followed by an introductory account of the 

 morphology of the genus Riccia, illustrated by figures, and containing 

 a useful list of hints concerning the special points to be noted in 

 determining the species of Riccia. To this is appended a synoptical 

 key of the 39 European species of this genus, followed by a detailed 

 key of the 26 species of Middle Europe. The descriptions of the 

 species are modelled on those of Limpricht's " Laubmoose," the recently 

 completed fourth section of Rabenhorst's " Kryptogamen-flora ;" the 

 species which inhabit Germany, Austria, and Switzerland are treated 

 in ordinary type, while those that occur outside these three countries 

 are described in small type. The descriptions are illustrated by figures 

 in the text, and a detailed distribution is appended. 



Scottish Hepaticae. J — S. M. Macvicar adds 125 records to his pre- 

 viously published lists of Scottish Hepaticag. Among them are three 

 additions to the Scottish flora : — Lophozia badensis Schiffn., Frionolobus 



♦ Hedwigia, xlvi. (1907) pp. 262-4 (figs, in text). 



t Rabenhorst's Kryptogamen-Flora. VI. Lebermoose, lief. 3. Leipzig: Kummer, 

 1907, pp. 129-192 (figs.). + Ann. Scott. Nat. Hist., 1907, pp. 45-9. 



