PALEONTOLOGY 



FIG. 23. LAMELLIBRANCHS. 



a, Leda (Dacryomya) lacryma (I. de C. Sowerby), InferiorOolite. Right side. 

 (X3.) (After Goldfuss.) o, Actinodonta cuneata Phillips, Ordovician. 

 Interior of left valve. Teeth white, sockets black, (x^. ) (After 

 Phillips.) c, Carbonicola robusta(}. de C. Sowerby). Coal Measures, 

 U pper Carboniferous. Right side, (xj.) (After Hind. ) d, Cardinia 

 listeri (J. Sowerby). Right side. ( x J.) d', C. ovalis (Stutchbury), 

 internal cast, (xj.) (After Quenstedt. ) e, Astarte bore Us (Chemnitz), 



