PLATE VIII. 



Astro PECTEN Hcxleyi, Wright. 



From the Forest Marble. 



Fig. 



1 a. AsTROPECTEN HuxLEYi, Wright, p. 123. Ventral surface, natural size. 



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



of the same individual at one view. 



c. Tavo 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. 



AsTROPECTEN CoTTESWOLDi^, var. Stonesfieldensis, Wright. 



From the Stonesfield Slate. 



2. AsTROPECTEN CoTTESwoLDEJE, var. Stonesfieldensis, Wright, p. 1.21. Dorsal 



surface, natural size. 



3. Ossicula of Asteriadje, magnified four times. 



4. Ditto magnified four times. 



« 

 5- Ditto magnified four times. 



6. Marginal plates of an Astrojjecten, 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. 



