ANALYSIS OF CONTINENTAL JOURNALS. 
53 
Oil examining these animals I at once recognised that they 
were affected with Tinea. On different parts of the cutaneous 
surface, but particularly the head, there were dry, irregular, 
split-up crusts of a yellow colour, raised in the margins and 
depressed in their centre, in the form of a cup, and of an 
aspect altogether characteristic. Wherever these crusts w T ere 
the hair had fallen off, but everywhere else the skin was 
healthy; beneath the crusts it was depressed and thin, 
but not ulcerated. Examining these crusts in the micro¬ 
scope w T ith a power of about 450 diameters, they were found to 
be almost entirely constituted by the elements of the Achorion. 
On June 1st following, a third mouse was captured alive 
by the same students, and it was also affected with Tinea , 
its head, from the tip of the nose to the extremity of the ears, 
being literally covered with it, and this gave the poor little 
creature a most singular aspect. In consequence of their 
confluence the cups were less distinctly marked than in the 
other two mice; but the general appearance of the crusts, 
their sulphur-yellow colour, and especially the results of a 
microscopical examination, left no doubt whatever as to the 
real nature of the affection. 
From this moment a veritable hunt after diseased mice was 
organized among our students, and it was so successful that 
on June 9th they brought me two more of these creatures in 
a diseased condition; on the 11th a sixth, and on the 23rd a 
seventh, all affected with Tinea in various degrees. The last, 
more particularly, bore a magnificent cup on the skin of the 
lower lid of the left eye. 
On July 17th one of the students, M. Herbet, also brought 
us another diseased mouse which he had taken alive in his 
room. This one was extremely bad ; the whole face was, so 
to speak, covered by a thick mask formed by a continuous 
crust, which was dry, yellow, and powdery in places, very 
adherent at certain points, easily detached at others, and 
when removed leaving the skin depilated, irritated, and 
of a reddish-violet colour, but not ulcerated. This crusty 
mass extended over the eyelids of the left eye in such a 
manner as to completely cover that organ. Independently 
of this principal mass, there was found on the margin of the 
concha of the left ear a very small Favus, scarcely so large 
as the head of a pin, but whose characteristics were well 
defined. There were also on the trunk two thick Favus plates, 
about the diameter of a gold ten-franc piece, and situated 
one on the right the other on the left side of the chest, where 
they formed prominences very appreciable to the touch. 
These crusts did not exhibit a cupuliform shape, but rather 
