60 GF. Barker—Physiological Chemistry. 
(72.) A paper by MicHast Foster, on the existence of gly- 
cogen in the tissues of certain entozoa, was presented to the 
Royal Society, November 4, 1865.* Although this igh tty 
has been found in many of the invertebrata. ‘by various obser- 
vers, no one has thus far noticed the very large cca ob- 
tainable from certain entozoa, is fact was first observed 
by Dr. Foster in a tape-worm, though the exact quantity was 
not determined. His principal observations were made on the 
round worm Suse ay lumbricoides ?) found in the pres 
of the common When minced and boiled with water, 
milky decoction is obtained, which is turned port-wine red a 
iodine and does not reduce the copper tests. When treated 
with saliva at 35° C., stp the liquid becomes clear and 
then reacts for sugar. On pouring the milky solution into al- 
cohol, an abundant white petipiiete falls. Glacial acetic acid 
causes the same precipitation, As only a minute trace of su- 
gar, if any, accompanies the glycogen, Foster ereuated the 
amount of the latter substance existing in these animals by 
converting it into sugar and determining this by a a 
‘rom two worms weighing when fresh 10:2 grams, with three 
others weighing ten grams, he obtained 2:2 per cent of sugar; 
a very large amount when compared with vertebrate tissues, 
use of glycogen in the mam mae no pga function 
can as s the reason of its presence in the ascaris. “Its 
* Proc. Roy. Soc., ‘ay, 643. 
