witli the two previous ones. I have only one specimen from 

 Bradford Abbas quarry, and should not venture to name it 

 except for its difference from all others that I have examined. 



Proportions : Length, 9 lines ; breadth, 8 ; depth, 6. 



ASTARTE RHOMBO IDALIS (pHIl). FIG. 8. 



IVfollusca from Groat 0. Morris and Lycett. — Tab. 9, fig. 20. 

 Isocardia rhomboidalis (Phil., Geol., York). 

 Hippopodium luciense (D'Orb Prod Paleont). 

 ,, Bajociense (D'Orb lb. ) 



" SheU thick, convex, sub-quadrate, or oblong ; umbones 

 anterior, obtuse ; hinge margin elongated, sub-horizontal, but 

 slightly arched ; lunule large, elliptical ; inferior margin nearly 

 straight, parallel to the superior border, and slightly sinuated ; 

 internal margins of the valves plain, acute ; folds of growth few, 

 large, and distinct ; concentric striations regular, delicate, and 

 closely arranged." 



" The vertical range of this remarkable species is very con- 

 siderable ; it occurs in the Inferior Oolite of the Cotteswolds, the 

 Great Oolite of Minchinhauipton, the Coralline Oolite of Malton, 

 and we have seen fine casts from the Kimmeridge Clay of Wilts. 

 The Hippopodium Luciense and H. Bajociense, D'Orb, are 

 probably identical with this species."* 



Very rare in Bradford Abbas quarry. Mr. Lycett's figure 

 represents a fossil three times the size of our specimen. Mr 

 Darrel Stephens has found larger specimens, but nothing like 

 the size of the great Oolite form. 



Proportions : Length 7, breadth 9, depth 7 lines. 



* Morris and Lycett, Mollusca from Great Oolite, pages 84 and 85. 



