Fig. 1 Lateral view of the head of Chlamydoselachus, the muscles related 

 to the hyal arch removed so as to expose the arteries and the branchial rays. 



Fig. 2 Ventral view of the same, the muscles removed and the mandibles 

 pulled somewhat apart so as to show the nerves and arteries. Ventral edge of 

 mandibular cartilage of right side (left in figure) slightly cut away. 



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