1902] MICROSOOPICAL JOURNAL. | 127 
saic or Hackensack. It is extremely delicate and the 
strie are very fine. Itis also very faint in color and 
can only be seen with difficulty. At all events it can be 
understood, when studied, to pass into Amphiprora ala- 
ta, O.G.E. which is brackish and marine and is extremely 
common on the meadows of New Jersey and elsewhere. 
In his Atlas to his Synopsis, Van Heurck figures Am- 
phiprora (Amphitropis) pulchra, J.W.B., A (A.) con- 
spiena, R.K.G., A. (A.) ornata. J.W.B., Plagiostropis 
van-heurckii A.G. and P. gibberula, A.G. Amphiprora 
pulchra, J.W.B. isa form that grows in salt-water on 
the meadows of Newark, N. J., and is a large form and 
is a sporangium of Amphiprora alata coming by A. con- 
spicua which is also common in the Champlain deposit 
of the Atlantic Coast. Wecan thus see how evolution 
changes Ampbiprora into Navicula on one side, and 
Amphora and Cymbella on the other. In fact, I believe 
it can be shown thus, how the whole Bacillaria are evolut- 
ed one from the other, but we cannot show it now for such 
a thing does not occur as evolution in one straight line. 
Thus, A was the form first made, or first created. Its de- 
scendants were Band B’and B”. These descendants were 
from B,C, C’ and C’. From B’ there were C,, C’, and 
C”’,and soon. Now C is intercrossed with Cy. and had 
for descendents D, D’ and D” and so on. So we can 
readily see but not reason how a form now came from 
the antecedent. But how soon it came, of course we can- 
_ not see or reason. We can perhaps see and reason how 
Amphiprora was formed even from Navicula, but Am- 
phora and Cymbella were formed afterwards or before. 
But it is complicated to even think out. Remember that 
we are considering forms as they appear to our sight and 
not forms as they are by physiological research. 
For Sale.—A Beck stand with three lenses, very little 
used. Price $10. Address: G.W. Wilcox, care this office. 
