740 ZOOLOGY. 
In one pond, or cluster of plants, I find the longer stamens about 
half the length of the style and twice the length of the shorter 
ones. In another the style is very short, not more than one- 
third the length of the shorter stamens, which, in turn, are about 
one-third as long as the longer ones. 
But the root is, perhaps, more curious than the flowers, being 
very thick, sinuous and knobby, living and growing many years, 
hard and woody, the bark turning black when cut.— C. wW 
CALYCERA BALSAMATIFOLIA.— The curious waif of ballast ground 
near Philadelphia, was determined by the discoverer himself, not 
by Dr. Leffman, as the latter informs us, at whose request we 
make the correction of the statement in the Narurauist for Oc- 
tober. 
PERFORATION or GERARDIA BY Bres (see p. 689).—We unfortu- 
nately omitted to insert the cut illustrating Mr. Bailey’s article on 
p. 689. The accompanying figure (180) shows the flower as in 
Fig. 180. 
‘ Gerardia perforated by bees. 
nature. with the point of perforation (p); also with the corolla 
spread open, a, aperture; g, guiding lines; and a front and side 
view of a stamen.— Eps. 
ZOOLOGY. 
Discovery or A TarpIcRapE.— We are not aware that there 
=~ ás any published notice of the occurrence of tardigrades in this 
~ country though undoubtedly microscopists have observed them. 
