388 General Notes. | April, 
Arctic ocean. No doubt the waters of the Aralo-caspian basin 
‘ have undergone many changes of level. Some of the mollusca 
which still live there, such as the Cardium and Dreissena, appeat 
th to be descendants of species found in the Congerian beds of that 
region, which go back to Miocene times.— T. F; Famteson in the 
Geological Magaziue, May, 1885. 
appearance below the festering layer. Then, provided the lamb 
does not die, the thick horny layer is thrown off like scurf, and 
the epithelium below attains new wool, and replaces the old skin. 
In studying the circumstances in which these sheep live, Dr. R. 
v. Lendenfeld found that they were invariably exposed to being 
wounded in those places, which eventually developed the disease, 
blistered by standing on rocks heated by the sun after they had 
been standing in water for several hours, or pricked by the spines 
of the variegated thistle, and it was found by a process of arti- 
ficial breeding in an aquarium that the disease is produced by an 
Ameeba (A. parasitica. n. sp.), which enters the wounds and mul- 
tiplies rapidly in the epithelium, causing very strong irritation. 
“he organism is found between the layers of horny substance. It 
©- does not differ morphologically from the well-known A. princeps 
of Ehrenberg. eo: 
Dr. Lendenfeld adds, “It is well known that several fungi 1 
certain stages of their life appear very similar to Amcebe, and so 
it is not impossible that my Amceba is in some connection with 
~ them. I do not consider this probable, however, as I made no 
_ observation which might lead one to suppose that the Amoeba 
ever divided into a multitude of swarming spores.” — Fourn. Roy. 
Micr. Soc., December, 1885. 
-of the Quekett Microscopical Club, exhibited some. stri -a 
_ note-paper on which were several groups of dried Philodines (4+ 
roseola), looking like clear red spots. These had been sent se 
