PLATE VIII. 

 AsTiioPECTEN HuxLEYi, Wright. 

 From the Forest Marble. 



Fig. 



1 a. AsTiioPECTEN HuxLEYi, Wriglit, p. 123. Ventral surface, natural size. 

 h. Dorsal surface of the same specimen, with one ray everted, and showing both sides 



of the same individual at one view. 

 e. Two marginal plates, with the combs of spines attached to the small inter-ambulacral 



bones, magnified four times. 

 d. Another view of the same plates, with the large spines, magnified four times. 



As'i'ROPECTEN CoTTESwoLDiiE, var. Stoneseieldensis, Wright. 



From the Stonesjield Slate. 



'2. Astkopecten Cotteswoldi^, var. Stonesfieldensis, Wright, p. 121. Dorsal 

 surface, natural size. 



3. Ossicula of Asteriad^, magnified four times. 



4. Ditto magnified four times. 



5. Ditto magnified four times. 



6. Marginal plates of an Astropecten, magnified four times. 



7. Ditto ditto magnified four times. 



8. Ditto ditto magnified four times. 



All these separate bones were collected from the Great Oolite. 



