58 



imbedded in the connective tissue in front of the basihyal (Bh). 

 Those immediately on each side of the middle line are elongated 

 somewhat flattened rods with an irregular outline, and are at one or 

 two points slightly fissured. Nodules varying in size are present at 

 their extremities except on the right side in one of the specimens. 

 The cartilages on each side extend transversely outwards from the 

 middle line to a point opposite the lower extremity of the cerato- 

 hyal (Ch). 



Fig. 1. 



