NEUCHATEL, June 20, 1827.

. . .Now you shall hear what I know of the "Hebammen Krote." How
the fecundation takes place I know not, but it must needs be the
same as in other kinds of the related Bombinator; igneus throws out
almost as many eggs hanging together in clusters as obstetricans;
fuscus throws them out from itself in strings (see Roseld's
illustration). . .I have now carefully examined the egg clusters of
obstetricans; all the eggs are in one string and hang together.
This string is a bag, in which the eggs lie inclosed at different
distances, though they seem in the empty space to be fallen,
thread-like, together. But if you stretch the thread and press the
eggs, they change their places, and you can distinctly see that
they lie free in the bag, having their own membranous envelopes
corresponding to those of other batrachian eggs. Surely this
species seeks the water at the time of fecundation, for so do all
batrachians, the water being indeed a more fitting medium for
fecundation than the air. . .It is certain that the eggs were
already fecundated when we found them in the ground, for later, I
found several not so far advanced as those you have, and yet after
three weeks I had tadpoles from them. In those eggs which were in
the lowest stage of development (how they may be earlier, nescio),
nothing was clearly visible; they were simply little yellow balls.
After some days, two small dark spots were to be seen marking the
position of the eyes, and a longitudinal streak indicated the
dorsal ridge. Presently everything became more distinct; the mouth
and the nasal opening, the eyes and the tail, which lay in a half
circle around the body; the skin was so transparent that the
beating of the heart and the blood in the vessels could be easily