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PTERYGOTUS PROBLEMATICUS. Agaam. 



From the Upper Ludlow Rock in the Quarry at Hagley Park, Herefordshire 



Fig. 1. Part of the claw of Pterygotus Proilematicus. It is probably the fixed 

 finger, and shows the striated spines of unequal size. 



Fig. 2. A portion of, probably, the spinous edge of the abdomen, with one of the 

 lateral appendages attached. 



Fig. 3. The large spine or appendage, magnified to show more clearly the 

 radiating stria} and lateral teeth. This spine may possibly be a 

 terminal joint of one of the feet pressed against the fragment, but not 

 articulated with it. 



Fig. 4. Some of the smaller spines magnified. 



