ESPECIALLY MYCTOPHOIDS 41 
processes are slightly rolled at the edges to give a longitudinally concave dorsal 
aspect. Woodward (1902 : 45, pl. 12, fig. 1) termed these pieces the nasals, due to 
their elongated and rolled form. It is quite possible that fusion has occurred and 
that the nasals have become combined with the mesethmoid, no trace of nasals 
having been found in the specimen. The lateral edges of the mesethmoid lie along 
10mm 
bo 
Fic. 17. Cimolichthys levesiensis Leidy. Neurocranium in ventral view. 
From B.M.N.H. number P.1811. 
