ORIGIN OF JAW APPARATUS Shi, 
through a complex nerve-net system of fiber distribution which 
involves both sensory and motor terminals. The special asym- 
metry of the nerve supply confined almost entirely to the 
velum will be taken up later, but it may be said in passing 
Fig. 9. Compound tendon connecting muscles of velum to body wall of Am- 
phioxus. At the velar end, Mc, are shown a few cut ends of the circular muscles 
of the velum while the tendons pass into the radial fibers. At the distal end the 
tendon spreads out into a brush of fine tendonous threads which insert in the 
connective tissue wall of the myotomes. 
that it does not affect the result of the innervation or 
the conclusions regarding the innervation of the jaw apparatus. 
Kutchin’s observations that a branch of the third nerve of the 
right side furnishes a branch to the inner mouth plexus, hereto- 
