504 tEOFFREY SMITH. 
impinges on the ectodermal cells of the antenna, then that 
these transmit the stimulus to the muscles which pull upon 
- 
TEXT-FIG. 7. 
Paranaspides lacustris. Second antenna. bas. Basipodite.! 
cxp. Coxopodite. 
TEXT-FIG. 8, 
Koonunga cursor. Second antenna. 
the club-shaped rods, These in their turn transmit the 
impulse to the setae and so to the nerve. 
[f this interpretation is correct the otocyst of the Anaspi- 
