83 



Bradford Abbas and Halfway House it will be well to give the 

 following 



Section of Bradford Abbas (East Hill) quarry. 



ft. in. 



1. Soil 04 



2. White Oolite with irregular cleaveage . . 60, 



3. Band of Marl with Astarte . . ..03 



4. Hard iron-shot rock with Astarte, Ammon- 



ites, Belemnites, etc. . . . . 10 



5. Band of brownish stone with Ammonites 6 



6. Iron-shot Oolite, a mass of Cephalopoda 1 



7. Marl with Astarte trigonalis . . . . 03 



8. Bed with Univalves 09 



9. Blue centred Oolite 12 



10. Keddish sands, commencing the Freestone 



system of Ham Hill and the Cotteswolds. 



(These latter are from 100ft. to 150ft. in thickness, occasionally 

 interpolated with bands of Oolitic stones.)* 



The following is a description of species : 



ASTARTE OBLIQUA, (DESll). FIG. 1. 



Cypricardia Lam. 



Shell suborbicular, posterior margin very oblique going from 

 the umbo in quite an oblique direction, upper margin lunulate ; 

 Lunule spoon-shaped ; shell smooth ; with very indistinct maik- 

 ings, interior teeth well produced ; Shell one of the thickest of 

 the series. 



It occurs very plentifully at Halfway House and Bradford 

 Abbas quarries ; most of the specimens have the valves separate, 

 though sometimes with the two valves in contact. This is perhaps 

 one of the commonest forms in the district. 



Proportions : Length, 30 lines ; breadth, 24 ; depth, 18. 

 * See proceedings of Dorset Natural History Field Club. 



