—_— = 
MOULTING HABITS OF SPIDERS. alata 
While these things take place, one of the inferior trichogenous cells of 
the matrix (nw.hel) augments in size and stretches itself in the direction 
of the hair tube (tu.oh) in the form of a light papilla (mw-.hcl), which 
originates the new hair, Some time thereafter this papilla ensheaths itself 
within the cavity of the old hair tube, perforating the layer of the matrix 
(mtx) situated above it. 
Sometimes, near the extremity of the new hair, as is shown in Fig. 68 
(tu.oh), one sees also the unsheathed tip of the new 
hair (nw.hr) standing up freely, and the remainder 
Fia. 68. Fic. 70. 
Fia. 68. New hair, nw.hr, shown within its old sheath, tu.oh, the tip exposed, and the base of the moult, 
mit, pushed off. Fre. 69. Tip of new hair shown within the old sheath before moulting. Fie. 70. Sec- 
tion showing the origin of a new hair (after Wagner); in.Jr.cto, inferior layer of old cuticle, ct.o; 1q, 
liquid filling interval; tu.oh, tube or sheath of the old hair; ch.lr, chitinous layer; nw.hel, new hair 
cell; mtx, matrix; rt.nw.hr, root of new hair. References uniform in the figures. 
thereof enclosed within the sheath. At the same time is seen the pubes- 
cence upon the new hair, and its root (rtmw.hr, Fig. 68). The relations 
of the tip of the hair to the old tegument are shown at Fig. 69. At this 
epoch the liquid (lq, Fig. 70), which filled the space between the old and 
new skin, disappears; afterward the sheath of the new hair breaks and 
is seen entirely formed under the old skin. 
