Geology and Natural History. 221 
tentacles at their base, forms the so-called circular canal, while 
ow it, and connecti ing with it, we have a large cavity form- 
cular ring and of the perivisceral cavity Mec ie that ob- 
served in Ophiurans, Starfishes, sh bys and Holot 
the Seay and position of the digestive organs and tentacles 
with similar organs of Bryozoa. However that ma 
th conclusively that the larva of Comatula has apparently 
nothin ommon with other Echinoderm | 
Wait for his figures on this intricate subject before we can decide 
if the position he assigns to Crinoids is true to natur A. AG. 
12. Chinese Botany.--W e have received, through fe kind atten- 
= of the author, a curious pamphlet, of ’50 pages, On the Study 
: Value of Chinese Botanical Works, with Notes on the History 
of Plants and Geographical Botany from Chinese Sources ; by 
Physician of the Russian Legation at 
chow. The preface bears the date of Dec. 17, 1870. In it the 
author declares that he is “neither a Sinologue nor a Botanist ;” 
his “knowledge in Chinese as well as in botany being very lim- 
ited.” ut his enquiries on the spot under advantageous condi- 
Hons, and the use he has made of “the splendid library 0 of the 
Russian Ecclesiastical Mission at Pekin ng, where are to be found 
hot only all Chinese works of importance, ais also most European 
fruit 
or the source of introduction is treated of by the aid of Chinese 
ents, some of th high antiquity. Cotton appears to 
e of a or of ea rly in ne n, and the question of nativi 
: 
| 
me 
Cane ie) not pass — China to India, but the reverse, and as 
 farly as the second century B, C., although it was several centuries 
- later ¢ that a native of India taught the Chinese to make — 
‘Sar, or “stone ho oney.” A. 
18. Plants killed by Frost : do they die in Freezing or n Thaw 
ing? That. in certain cases plants die in freezing, is a Ag 
pyeerehide, notably the milk-white blossoms of Calanthe vera- 
ia, produce ably th but only upon a chemical reaction, which 
