132 



CBELOtflA. 



posterior region of the left side is b, >ken 

 nuchal bone is imperfect, but the conk t of 

 remaining is very like that of Dermatemyc> t and 

 indicates that the anterior border was n 

 The whole of the neural bones and the sulci 

 tebral shields are distinctly shown, and th ■■ vela 

 the anterior shields are generally similar to thoi 



Fio-. 30. 



Trachyaspis (Bgyptiaca. — The carapace ; from Tertiary (?) beds in Egypt. £. 

 The third right costal is shown below on a larger scale, with the sculpture. 

 Each segment of the divided second neural has been separately numbered, 

 so that the neural marked 4 is reallv the third. 



