and one of these articulations 
is shown in the illustration on 
page 657. Apparently, just 
beneath a very long hair 
(which, of course, is really 
outside the joint) a_ little 
central band can be noticed, 
uniting the two parts of the 
joint together, reminding the 
student of the 
round lgament in our own 
hip-joint. This band is to 
assist in holding the parts in 
juxtaposition, 
mitting free movement in all 
directions. 
anatomical 
although — per- 
The foot, seen greatly mag- 
nified on the same page, is 
of wonderful structure; at a 
glance a comb can be plainly 
seen with several teeth for 
striking into the web, but 
on closer inspection, a second 
—out of focus from being so 
far behind—is just visible. 
A third and very bent hook 
is not always present, but 
one is visible in this  speci- 
men, being situated below the 
two great ones. It is said 
not to be used for the web at 
all, but to be of service in 
crawling up rocks or slippery 
surfaces, capable of 
ejecting an adhesive fluid to 
render movement more easy 
by stopping all slipping. 
If a claw is lost, it will 
be found to have grown again 
being 
later on, but, curiously, does 
not seem to occupy its final 
place until the animal per- 
forms its next moult, every 
Spider changing its skin about 
five times from birth to 
maturity. Whilst waiting for 
this to occur, a new claw 
may sometimes be seen quite 
properly formed, resting within 
Marvels of the Untverse 
Photo bu 
A SPINNERET OF THE SPIDER. 
(ZL. J. Spitta, F.R.MLS. 
A direct view of the conical projection, showing more clearly this dark ring 
Photo by] 
controlling the web. 
A SPINNERET OF THE SPIDER. 
[E. J. Spitta, PRMS,. 
The delivery tubes, by which means the fluid thread is projected. 
