8 oe e . * 4 i. - 
dieatey of sugar in solution. The blood also contains a ae quantity 
of sugar. The portion of the fourth ventricle in which a wound produces 
e, this effect, is poe to a small space a little above the origin of the 
7 = Bh pair of nerv 
The results of this curious discovery promise to throw new light upon 
the process of digestion. 
Il. MINERALOGY AND GEOLOGY. 
otice of ba ead in the Cabinet of Dr. Julius S. Taylor, (in 
a ees addressed by Dr. Taytor to the Editors.) —Believing that any 
information upon i subject of trilobites is at all times acceptable to the 
a ae world, I venture to tell you of a remarkable portion of — 
fi a few days past by me. It is an “ Isotelus megistos,” and It 
Sressae the most remarkable evidence of their gigantic size, of i 
Specimen now extant. It was found in our blue limestone strata, and 
presents the tail or * gee we and seven of the segments across 
in 1 Tengah and 94 in breadth 
I see that Mr. Barrande of Prague is of the opinion that trilobites 
change songs fesdag rs: to age. Of the eg te of that opinion 
me doubts, as 
I shor 
e 
Mineraney 0 and Gey. 113 
. 
oh 
s 
