en subsequently
verified by Professor Weinek on a Lick observatory negative.

ISODORUS.--The rampart of this fine ring-plain, which is of about the
same size as Capella, rises at a peak on the W. to a height of more than
13,000 feet above the interior, which, except a small bright crater at
the foot of the E. wall and a smaller one adjoining it on the N.,
contains no detail. The region between Isodorus and the equator includes
many interesting objects, among them Isodorus _b_, an irregular formation
open towards the N., and containing several craters.

BOHNENBERGER.--A ring-plain about 22 miles in diameter, situated on the
W. side of the Mare Nectaris, under the precipitous flanks of the
Pyrenees, whose prominent shadows partially conceal it for many hours
after sunrise. The circular border is comparatively low, and, except on
the N., continuous. Here there is a gap, and on the W. of it an intrusive
mass of rock. From its very peculiar shadow at sunrise, the wall on the
E. appears to be very irregular. The club-shaped central mountain is of
considerable size, but not conspicuous. S. of Bohnenberger stands the
very attenuated ring, Bohnenberger A. It is of about the same diameter,
has a large deep crater on its N. rim, and a smaller one, distinguished
with difficulty, on its S.E. rim. On the N. of Bohnenberger there is a
bright little ring-plain connected with the formation by a lofty ridge,
under the E. flank of which Schmidt shows a crater-chain. An especially
fine cleft originates on the E. side of this crater, which, following an
undulating course over the Mare Nectaris, terminates at Rosse, N. of
Fracastorius.

TORRICELLI.--A remarkable little formation in the Mare Tranquilitatis, N.
of Theophilus, consisting of two unequal contiguous craters ranging from
W. to E., whose partition wall has nearly disappeared, so that, under a
low sun, when the interior of both is filled with shadow, the pair
resemble the head of a javelin. The larger, western, ring is about 10
miles in diameter, and the other about half this size. There is a gap in
the W. wall of the first, and a long spur projecting from its S. side;
and a minute crater on the S. border of the smaller object. Torricelli is
partially enclosed on the S. by a circular arrangement of ridges. There
is a delicate cleft running in a meridional direction on the Mare, E. of
the formation, and another on the N., running from W. to E.

HYPATIA.--A ring-plain, about 30 mile