Bryophyten. 
19 
10. Trotz des Fehlens der Sporen können die jungen, vegetati¬ 
ven Zellen der Kokken , wie Micrococcus luteus, M. roseus, Sarcina 
candida und S. flava, die gewöhnliche Winterkälte ertragen. 
11. Von chromogenen Arten wurden gefunden: Bacillus niesen- 
tericus, B. singularis, B. citrinus, B. dijfusus, B. mucronatus, B. 
excurrens, B. stellar is, B. fluorescens non liquefaciens; Bacterium 
giganteum, B. citreum, B. aeris; Sarcina flava, S. aurantiaca, S 
mobilis, S. incarnata; Micrococcus luteus, M. chryseus, M. aurantia- 
cus, M. roseus, M. cinnabareus. H. Hattori. 
Britton, G., The genus Zygodon in North America. (The 
Bryologist. XI. p. 61—66. plate 6 and text-figures. July, 1908.) 
The author discusses at some lenght the various American col- 
lections of Zygodon in connection with European specimens and 
Correns’ figures (several of which are reproduced), recognizing 
three species, as follows: 1. Zygodon viridissimus (Dicks.) Brown 
(including Z. rufotomentosum E. G. B., in sched.), 2. Z. rupestris 
Lindb., and 3. Z. gracilis Wilson (syn. Z. Nowellii Sch., Didymodon 
subalpinus Cardot), this last known in America only from a single 
Station at 6000 feet in North Carolina. The 3 species are descri- 
bed, their distribution is indicated, and exsiccatae and icones are cited. 
Syrrhopodon? excelsus Süll., 1848, syn. Zygodon Sullivantii C. M., 
1849, becomes Leptodontium excelsum (Süll.) E. G. B. This is described, 
its relationship is discussed, and illustrations are cited. It is known 
only from the Southern Alleghanies of the eastern United States. 
Maxon. 
Evans, A. W., Hepaticae of Puerto Rico, VIII. Symbiesidium, 
Marchesinia, Mastigolejeunea, Caudalejeunea, and Bryopteris. (Bull, 
of the Torrey Botanical Club. XXXIV. p. 533—568. plates 31—33. 
Nov., 1907.) 
In continuation of previous studies of the Hepaticae of Puerto 
Rico the author here deals historically with the several genera 
mentioned above. Of the first genus 4 species have been reported 
from Puerto Rico, of which 2, S. transversale (Sw.) Trev. and S. 
barbiflorum (Lindenb. and Gottsche) Evans, comb. nov. ( Lejeunea 
barbiflora Lindenb. and Gottsche) are described and figured. Notes 
are given also on S. granulaturn and S. vincentium, known from 
Puerto Rico without definite locality. Marchesinia, with a single 
exceedingly variable species, M. brachiata (Sw.) Schiffn., is similarly 
treated. Of the widely distributed genus Mastigolejeunea onty one 
species, M. auriculata (Wils, and Hook.) Schiffn., is known from 
Puerto Rico. In the genus Caudalejeunea the 5 nominal species are 
considered to be forms of one, C. Lehmanniana (Gottsche) Evans, 
comb, nov., which is fully described and figured. In conclusion, the 
relationship and characters of Bryopteris are discussed at conside- 
rable lenght: the single species, B. filicina (Sw.) Nees, widel 3 T 
distributed in tropical America, is known from Puerto Rico, 
Maxon. 
Evans, A. W., The synonymy of three American Hepaticae. 
(The Bryologist. XI. p. 67—70. July, 1908.) 
As a result of an examination of certain specimens in the Lin¬ 
denberg herbarium the author presents notes upon 3 species of 
