Plate IY. 

 All tlip dra/vings are by J. Henry Blake. 



Fig. 1. Amynilyspes ? sp. |^. 



2. Amynilyspes 1 sp. \. 



3. Archiulvis lyelli, a few contiguous segments, \. 



4. Arcliiulus xylobioides, part of a single segment, \. 



5. Arcliiulus euphoberioicles, the largest fragment, \. 



6. Arcliiulus euphoberioicles, a few contiguous segments, ^. 



7. Arcliiulus lyelli, the largest fragment, \. 



