38 SPONGES 
It now remains only to examine the fibers of the elongated filamentous 
growths of which I have spoken and of which I give a cut in Fig. 12, B, page 
20, Here we find that the growth is inclined to be upward rather than lateral, 
that the meshes af the skeleton are clongated, and that the fibers are greatly 
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A, Gray Cup; B, Green Cup; C. part of B, life siz. 
These fibers do not present a healthy appearance, nor are they thick- 
I] give anexample of these flattened and antler- 
‘These are from the long filamentous projec- 
| Norr, All of the figures of fibers 
flattened. 
ly covered with horny matter. 
like fibers in fig. 17, M and N. 
tion of which I give a cut in fig 12, B. 
