C *87 3 
B B. The fecond Series running tranf^ 
verfely.- 
C C. The third taking a different CouiTe. 
© 2 ). The lower Edge, which is infixed to 
the Head. 
Sect. XI. 
Fig. 4. The Sh<:Il or Hemlcranium feen on the In- 
fide with the Procefs running crofs it, one 
End of which A is fix’d, the other a is 
moveable. 
Sect. XII. 
Fig. 5. A.B. C.^D* The fame as in Fig. f, 
' E, The Hinge, whereby thefe arc 
conneded, and may eafily 
dilate or open. 
Sect. XIII. 
Fig. 6. AA, The Membrane covering the Head 
freed from the Hemkrania, which 
were attach’d to this Membrane. 
B. The Place, where the Hemkrania 
were conneded. 
c. The middle anterior Part, in which 
the Tubercle was prominent. 
Sect. XIV. 
Fig. 7. A A* The Membrane of Fig. 6. feparated 
and' turned back. 
The pellucid pyriform Body lying in 
the middle of the Head, and which 
formed 
r. The Tubercle* 
i ' O o. 2 Sect. 
