XXIV 



THRACIA. LEACH (j). 

 (Anatina Convexa, 41J 

 (Anatina Pubescens,4\ .) 

 (Anatina Declivis, 42.) 

 / 70. 



LUTRARIA. 



Oblonga, 44. 

 Flliptica, 45. 



LISTER A (k). TURTON. 

 L. Compressa (Lutraria, 

 C. 45). 



MACTRA. 

 Solida, 46. 

 Truncata, 46. 

 Subtruncata, 47. 

 Stultorum, 47.. 



Cinerea, 47. 

 Glauca, 48. 

 Fragilis, 48. 

 Elliptica, 244, /. 28. 



LEPTON. 



Squamosum, 49 . 

 Nitidum, 49. 



GOODALLIA (I), 

 Triangularis, 49. 

 Minutissima, 50. 



ERVILIA. 



Nitens, 50. 

 Pellucida, 245; 



KELLIA. 



Suborbicularis, 5 1 . 



(^') Transversely oval-oblong, inequivalve, slightly 

 gaping at each extremity. Hinge consisting of a more 

 or less prominent horizontal spoon- shaped tooth which 

 receives the ligament. Palleal scar deeply impressed. 



(k] Transverse, oval, equivalve, a little open at the 

 sides. Hinge with a spoon-shaped tooth and additional 

 denticles, no lateral teeth. Ligament external. 



(I) Possibly young ASTARTE'S. 



