PLATE VIII. 
Fig. Page 
1. Hybodus delcibechi, Cliarlesworth; head and anterior portion 
of abdomen, superior and lateral aspects, one third nat. 
size.—L. Lias; Lyme Kegis. c.s. 1 , c.s.' 2 First and 
second pairs of cephalic spines, m. Mouth, with a few 
teeth, orb. Orbit, ptq. Portion of pterygo-quadrate. 
t. Isolated tooth. [39880.] 259 
2, 3. Ditto ; dermal tubercles from the top of the head in the 
same specimen, three times nat. size. 260 
4, 5. Ditto ; dermal tubercles upon the trunk, slightly behind 
the head, in the same specimen, three times nat. size. 260 
