ZOOLOGY AND BOTANY, MICKOSCOPY, ETC. 339 



separated under t\YO different genera — as Rehoulia (originally Rehouillia) 

 hemisphaerica Raddi (1818), and i^/m&n«m (originally spelled ^//w&r^/'^V*) 

 teneUa Nees (1820). The name Asterella tenella should be restored ; 

 but strangely enough S. 0. Lindberg (1868) revived Asterella for 

 A. hemisphaenca, while Trevisan (1874), in ignorance of this, revived 

 Asterella for A. tenella with five other species, but soon afterwards 

 (1877) adopted Lindberg's definition of Asterella and revived Corda's 

 Hypenantron for A. tenella and its alHes. Lindberg at the same time 

 also changed and accepted Trevisan's definition of Asterella for A. tenella 

 and its allies. Le Jolis (1895) ridiculed this confusion and advocated 

 the suppression of Asterella. But, by the rules, Asterella must stand, 

 though most authors have preferred to use Fimhriaria. The number of 

 species in the genus is now about ninety-seven. A chapter is devoted 

 to the morphological features of the plant. Detailed descriptions 

 of the fifteen Xorth American species (three are new to science) are given, 

 with synonymy, distribution, and critical notes. And a most helpful key 

 to the species is provided. A. G. 



Three South American Species of Asterella. — Alexander W. 

 Evans {Bidl. Torrey Bot. Cluh 1920, 46, 469-80). Detailed descrip- 

 tions of three species of Asterella^ which are restricted to Chili, Ecuador 

 and Bolivia respectively ; six other species have been recorded for the 

 continent, two of which are extensions from North America. A. G-. 



Notes on North American HepaticsB. VIII. — Alexander W. 

 Evans {Bryologist, 1919, 22, 54-73, 1 pi. and figs.)- Critical notices of 

 ten species of Hepaticae, especially Corsinia coriandrlna (Spreng.) Lindb., 

 Petalophyllum Ralfsii (Wils.) Nees & Gottsche, Nardia fossomlronioides 

 (Aust.) Lind., A", rubra (Gottsche) Evans, N. suMlifptica Lindb., some 

 of which are discussed at considerable length and figured. A. G. 



Notes on New England Hepaticse. XV. — Alexander W. Evans 

 {PJiodora, 1919, 21, 149-69, 1 pi. and figs.). Nardia hyalina (Lyell) 

 Carringt., N. olscura (a new species) and N. olovata (Nees) Lindb. are 

 described and discussed in detail. A. G. 



New Riccia from Peru. — Alexander W. Evans {Torrey a, 1919, 

 19, 85-8, 1 fig.). Riccia histriata, a new species collected at Santa Ana, 

 in Peru, by 0. F. Cook and G. B. Gilbert in 1915, is characterized by 

 a feature not known elsewhere in Marchantiales — namely, parallel pairs 

 of thickening-bands running vertically down the sides of the columns of 

 cells which form the green assimilative tissue of the thallus. A. G. 



Notes on North American Sphagnum. VIII.— A. LEPtOY 

 Andrews {Bryologist, 1919, 22, 45-9). A continuation of the mono- 

 graph of the section Cuspidata, containing critical notes on Sphagnum 

 tenellum, S. cuspidatum and its var. Torreyi^ and incidentally on some 

 allied species. A. G. 



Ecological Succession of Mosses. — Aravilla M. Taylor {Bot 

 Gaz., 1920, 69, 449-91, 2 figs.). A discussion of the moss ecology of 



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