428 TRANS. OF THE ACAD. OF SCIENCE. 
phalie capsules or utricles, like which we find a huge devel- 
opment, as of a helix, in the helicine valves, and in shells in 
general. In the segmented animals, naturalists have one 
been struck with the tracheal developments pervading, in 
sects, the whole bodies, and provided with paenee rds 
or so many pumping nostrils (compare frogs’ nostrils) all 
the sides of their bodies, chiefly consisting of a tere 
gland, and, in the undeveloped oan constituting but a huge, 
segmented, ¢ glandular mass, whence the spi er-net and cocoon 
are spun out. The insect-head seems to ey destitute both of 
a true vitreous mass and cephalic utricles. The Ps oboscidal 
fabric of the t. ring in its — devoid of vitre- 
ous mass and aenels nothing but the branchial system of 
wings so often re abl eapua’ F (€. Bry in i and 
"0 iypods 
correct ) together with Asterida and ira are a 
“Fevise, of 
divesting the phenomena, as much as ingenuity can a 
their common features or conditions ultimately to enerall- 
at certain fundamentals, which, admitting a no 
zation, are hence inexplicable, constituting ia 
tal 4 which, by niversal tations, and 
tases, ee ete., and a hb cao coapann ae — 
* 
