87 

 GEOUP II. 



ASTAKTE EXCAYATA. FIG 9. (Sow. Miu. Coucli. Tab 233). 



Goldfuss. T. 134.— Fig 6. 

 A. complanata (Eomer T. 6. — Fig 28. 

 " Spec : Cliar. Obovate, convex, concentrically costated ; 

 anterior side truncated ; lunide hemispherical, excavated ; car- 

 tilage enclosed in a sulcus ; margin toothed. "f 



Proportions : Length 48, breadth 36, depth 20 lines. 

 This is the largest species of the genus. Its lines are usually 

 vrell defined, and it is perhaps the most abundant of the series. 

 It is somewhat rare to find two valves together, but this is not 

 uncommon at Bradford Abbas quarry. 



AST ARTE ELOXGATA (XOBIS). FIG. 10. 



Shell slightly gibbose, anterior margin curved, elongated, and 

 gradually sloping to a point ; base straight ; lines almost 

 rectangular and clearly defined ; lunule obovate, and somewhat 

 deep. 



This shell is not unlike the preceding, but differs from it 

 in its greater length, as the following will show. 



Proportions : 40 lines, breadth 30, depth 18. 



Somewhat common at Bradford Abbas. It is a very elegantly 

 shaped shell, but rarely found with both valves together. 



ASTARTE ELEGAXS. FIG. 11. 



Sow : M. C. T. 137.— Fig. 3. 

 Fhill: G. T. T. 11.— Fig. 41. 

 Goldfuss: T. 134.— Fig. 12. 

 Spec : Char. Transversely oblong, convex, depressed, with 

 + Sow, Mia, Conch, page 57, vol. iii. 



