PLATE IV. 



ECIIINODERMS OF THE LONDON CLAY. 



Fi<r. 



1 . ASTROPECTEN ARMATUS, p. 29. 



\a. Natural size of specimen. 



\h. Marginal plates and spines, magnified. 



•1. ASTROPECTEN CUISPATUS, jy. 29. 



2c/. Upper surface. 

 2 /a Under surface. 



3. ASTROPECTEN ? CoLEI.^;. 30. 



3a. Specimen of natural size. 

 3i. Plates and spines. 



4. GONIASTER MARGINATUS, Ji./. 31. 



5. GONIASTER TUBERCULATUS, jO. 31. 



5a. Natural size of fragment. 

 ^b. A marginal plate magnified. 



(i. GoMAsTEii Stokesii, ^;. 30. 



6a and /;. Portions of rays. 

 Gc. Marginal plates magnified. 



7. Ol'MlURA AVeTHERELLI, JO. 32. 



la. Restoration. 



lb. A specimen, natural size. 



7c. Portion of the upper surface of an arm. 



8,9,10. Columns and joints ofPentackinites si;hbasai/hfok.mis, y;. 34. 



