1901 | CURRENT LITERATURE 431 
A NEW FASCICLE of Urban’s Symbolae Antillanae* has appeared. It con- 
tains the conclusion of the monograph of Arthrostylidium by PILGER, 10 
species being recognized, 4 of which are new; an enumeration of Gesneriaceae 
by Urban, including descriptions of 15 new species; a synopsis of Myrsina- 
ceae by MEz, with a recasting of several genera and descriptions of 11 new 
species ; a synopsis of Theophrastaceae by MEz, including two new species: 
descriptions of new species and genera by URBAN, the latter being Hyptio- 
daphne (Thymeleaceae), and three new genera of Compositae, namely, 
Letraperone, Koehnela, and Notoptera, all of them Helianthoideae; and 
descriptions of 10 new liverworts by SrEPHANI.—J. M. C 
By USING an improved apparatus which enabled him to measure quickly 
and accurately small amounts of CO,, Kolkwitz™ has been able to determine 
that air dry grains of barley containing about 15 per cent. of water, which 
gradually diminished in the laboratory to Io or II per cent., respired at a 
rate which produced in 24 hours one-third to one-half a milligram of CO, per 
kilogram of seeds. At 33 per cent. of moisture 2000 milligrams of CO, were 
produced. He also found both embryo and endosperm very tenacious of 
life. Respiration continued for several hours after such hard treatment as 
grinding. A full description of the apparatus with figures and an extended 
account of the investigation will be published in the ae of ‘Das Institut 
fiir Gihrungsgewerbe und der Versuchsbrauerie in Berlin.” —C. R. B. 
TAMMES*S has made an important investigation on the distribution of 
Carotin. He agrees with most recent authors in identifying carotin with 
xanthophyll or chlorophyll-yellow and etiolin. Tammes goes somewhat 
further than most previous investigators in considering practically all red to 
yellow plastid pigments as carotin. Plastid pigments were examined and found 
to exhibit carotin tests in green and etiolated leaves, yellow parts of varie- 
gated leaves, autumn leaves, flowers, fruits, seeds, diatoms, alge (green, 
blue-green, brown, and red), and carrot roots. Carotin always accompanies 
chlorophy]l, appearing before it and remaining after it has gone, and also 
occurs where chlorophyll is always absent. Carotin is probably more or less 
efficient in carbohydrate synthesis, as Engelmann has shown. — C. 
CowLes 
HANS HALLIER™ has presented a somewhat extensive regrouping of 
angiosperms, taking into account contributions from all departments of 
*3Symbolae Antillanae seu fundamenta florae Indiae occidentalis. Vol. II. Fasc. 
3. Pp. 337-507. Leipzig: Gebriider Borntraeger. 1901 
™ Ber. deutsch. bot. Gesell. 19 : 285-287. 1901. 8 Flora 87 : 205-247. [900. 
er die Verwandtschaftsverhiltnisse der Tubifloren und Ebenalen, den poly- 
Phyletischen Ursprung der Sympetalen und Apetalen, und die Anordnung der Angio- 
Spermen iiberhaupt. Abhandl. Geb. Naturwiss. Verein Hamburg 16: I-I12. Igol. 
