402 SUMMARY OF CUEEENT EESEAECHES RELATING TO 



archegonium. The earliest stages of the embryo were not seen ; hut in 

 the youngest example a large haustorium of large cells (as in Palla- 

 vicinia) was present, derived presumably from the lower half of the 

 embryo. The rest of the embryo becomes differentiated into foot, seta 

 and capsule, but the foot is not clearly delimited from the seta. In the 

 capsule the sporogenous tissue is differentiated at a rather late stage. 

 The capsular wall is three-layered, and the apex is thickened and con- 

 spicuously beaked, as in Podomitrium and PaUavicinia. The elaters are 

 few, but long. In the absence of a perianth, the calyptra is very 

 massive. The mature capsule is ovoid, and dehisces by four broad, rather 

 irregular valves. Of all the Anacrogyn^e, Treuhia comes nearest to the 

 acrogynous Jungermanniales. On the other side Treuhia is nearest 

 related to Noterodada, which leads on to Petalophylhan, and so to 

 Fossomhronia, which shows some significant resemblances to the lowly 

 Sphasrocarpales. 



Metzgeria from Galapagos Islands.* — A. W. Evans describes and 

 figures a new species of Metzgeria from the Galapagos Islands, M. 

 grandiflora, collected by A. Stewart with nearly a score of other hepatic^. 

 The female inflorescence is unusually large, with remarkable connivent 

 involucral wings. The thallus is strongly convolute, with marginal 

 hairs only, and the cortical cells of the costa in two rows, both dorsally 

 and ventrally. The author shows how the plant is distinguished from 

 M. comata, M. fflaberrima, and 31. sinuata, its nearest allies. 



Hepaticae of Europe.! — K- ^fuller has advanced the publication of 

 his " Die Lebermoose Deutschlands, Oesterreichs und der Schweiz " by 

 the issue of five more parts, which treat of the Ftilidioidea^, ScapanioideiB, 

 PleurozioidetB, Raduloidese, Madothecoidea3, Jubulese, and Lejeuneai 

 (beginning). The genus Scapania is divided into seven natural groups, 

 named after the typical species of each, and two new species are de- 

 scribed. The genus Madotheca is critically revised, and Nees's mistakes 

 are put right. And some of the more recent species of Frullania and 

 Madotheca are found to be identical with older North American species. 

 Lejeunea is divided into several sub-genera. 



J 



Dicranacese.l — I. Hagen, continuing his studies of the Norwegian 

 moss-flora, treats of the family Dicranaceee, sub-divided into Dicranowei- 

 sioidese (with entire teeth), Trematodontoidete (capsules with long 

 stomatiferous neck), Campylopodoidefe (leaves very broad-nerved ; 

 perichaetium distinct), Anisothecioidea? (leaves narrowly nerved ; peri- 

 chffitium noue), Dicranoideae (alar cells more or less distinct ; pericha3tium 

 vaginant). In Dicranoweisioidea; he creates the new genus Cnestrum for 

 RhabdQwelsia schisti; and transfers to this sub-family Amphidium on 



* Torreya, xvi. (1916) pp. 67-70 (figs.). 



t Rabenhorst's Krypt.-Flora, vi. Lief. 20-4 (Leipzig: Kummer, 1914-15) 

 pp. 337-656 (figs. 99-183). See also Bot. Ceutralbl. cxxxi. (1916) pp. 409-11. 

 X K. Norske Videnskab. Selskab. Skrift., 1914 (Trondhjem, 1915) pp. 1-192. 



