1881.] Botany. , 997 
Hrs the Early Larval Stages of the Fiddler Crab, and of Alpheus. By A. 
. Packard, Jr. 8vo,pp.10. Cuts. Extract from the American Naturalist, October. 
Paden 1881. From the author. 
On Pgh Big Rs: a ae a? oe 2 ee Wyomin By A. S; 
ied te O, pp. Departmen e Interior, Ghited ‘States Geo- 
logical and Gengeaphicel’ Saver. Gover nana panes Office, Washington, Sep- 
tember 19, 1881. From the author 
Annotated List of Birds of yiads. by W. J. Hoffman M. D, 8vo, pp. 50. De 
partment of the Interior, eon d States, Geological 8 _Geographical Survey. 
fice 18 Fr 
Government Printing O Washington, 1881. From the 
Giinther’s eS sae _Morphography mh Fishes. ei Paige of Dr. Giinther’s 
introduction to the Stu udy Fishes. By eodor ill, i: M. 
aE 
I2mo, Pp. 16, rear es the.‘ coi ioc Sream?” New York, 1881. From the 
autho 
The New cag ae pee on Past best method of Teaching. By W. J. Beale, 
M. D., Ph.D. Fro e Transactions of the Twenty-ninth annual 
Meeting of the Micthixes pet Teaches? s Association, Lansing, 1881. From the 
Mivart on the Cat, Review of by Prof. George Macloskie. 8vo, pp. 4. From the 
October number of the Presbyterian Review. New York, 1881. From the author. 
The Journal (Formerly Archives) of Comparative Medicine and Surgery. A 
sales ee of the Anatomy, Paint get and Therapeutics of the Lower Animals, 
ew York, I. From the publishers 
rial - a Kraniologie der europaischen hegre Von Professor J. Koll. 
4to, pp. 120. 4 plates, colored, Aus dem “ nee 
fir Anibeisonee it Band XiIl, tes 4. janie 1881. From the au 
Essai sur Le Classement des Animaux qui vivent sur la Plage sag envi- 
tons de Dunkerque. “Proiniecie deseloull, Par M. O. Terquem, ancien Pharma- 
cien. 8vo, pp. 54. 5 plates. 1881. 
SRN Ante of remains of Batrachia of the Coal Measures of Nova Scotia. By J. 
W. Dawson. Montreal 1881. 
—— :0:—— 
GENERAL NOTES. 
BOTANY .' 
DimorpPuisM IN Brack Mustarp.—It may not be generally 
known that there are two forms of flowers in the common mus- 
tard Lorre nigra), which differ mainly in the length of the pis- 
til. In the short-styled form, the top of the stigma does not 
quite reach to the bases of the higher anthers, and is about even _ 
with the tips of the lower ones. The long-styled has the stigma — 
reaching to the middle of the higher anthers. ere dimensions of 
€ stamens are nearly identical in the two for 
In each flower, they may be naturally divided into two sets, 
each set consisting of two long stamens and one short. Those of 
the same set face toward each other, that is, toward the nectary of 
the set, which is surrounded by them and the pistil. There are — 
two nectaries, therefore in each flower, and on opposite sides of 
the pistil. Two advantages of this arrangement should be men-— 
tioned: first, the anthers near the pistil turn away from it, so that 
cba pollen does not ed reach it, but rather the bill ofthe 
nee eke cn reaches down to is nde and euros r as oe . 
ae eee 4 - / ‘ 
