104 
Some Observations on the Bahamas and Jamaica. J. R. Roth- 
rock. (Proc. Am. Philos. Soc. xxix. 145, reprint). 
The Aspect of Trees in Winter. (Gard. and For. v. 50.) 
With illustration of a branch of Quercus tinctoria. : 
The Comparative Morphology of the Fungi. James Ellis Hum- 
phrey. (Am. Nat. xxv. 1055). 
The Bearberry in Central Nebraska. Ch. E. Bessey. (Am. 
Nat. xxv. 1030). 
Arctostaphylos Uva-ursi is reported from the basin of the 
Long River, Custer County. 
The Effect of Mechanical Movement upon the Growth of Certain 
Flower Organisms. i: L. Russell. (Bot. Gaz. xvii. 8). 
The Future of Systematic Botany. John M. Coulter. (Frog 
Am. Ass. Adv. Sci. xl. 1891, reprint). : 
Thrinax Morrisii, Wendl. (Gardn. Chron. xi. 104, with illus- 
trations, 
The description of a new palm from Anguilla, W. I. 
Ueber einige Lobeliaceen des Wiener Herbariums. A. Zahl- 
bruckner. (Annalen K. K. Nat. Hist. Hof. Mus, Wien. vt 
Nos. 3 and 4, 1891 reprint). 
Five new species of Centropogon from Bolivia, Peru and 
Ecuador, are described as well as five new species of the genus 
Siphocampylus. Synphoranthera polystachya, Boj. Mss., is pub- 
lished for the first time. 
What is a Diaton? Charles F, Cox. (Jour. N. Y. Mic. 5 
ciety, viii. 1-28). 
This a most entertaining and instructive paper. The author 
_ does not claim to have settled the question propounded, but he 
has certainly added materially to the sum total of our knowledge 
upon the subject. He shows that a study of these interesting 
organisms, so low down in the scale of life, brings before us most 
of the leading problems in biology. oi 
The structure and life-history of the diatoms, together with 
the reason for assigning them to the vegetable kingdom, are ably 
discussed, as are also the different theories which have bee? 
framed to account for their power of motion. 
Incidentally the writer pays a tribute to the diatomists wh 
despite the ridicule often encountered, have labored so untir ingly 
