BRITISH FOSSILS. 



Locality. — All tlie specimens are from the Purbeck strata 

 Hartwel], near Aylesbury. 



« Explanation of Plate. 



rig. 1. Pleurophohs atienuatus, magnified. 

 Fig. 2. P. crassicaudus, size of nature. 

 Fig. 3. P. IcBvissimus, size of nature. 

 Fig. 4. P. longicaudus, size of nature. 

 Fig. 5. P. scrratus, size of nature. 

 Fig. 6, P. serratus, size of nature. 

 Fig. 7. P. serratus, size of nature. 

 Fig. 8. Scale a, magnified. 

 Fig. 9. Scale h, magnified. 



P. DE M. Grey Egerton. 



February 1857. 



