EXPLANATION OF PLATE LXVI. 



Fig. 1. Leda pala, Hedley. 



„ 2, 3. Leda fortis, Hedley — hinge and extei-ior. 



,, 4, 5. Thyasira alhigena, Hedley— liinge and exterior. 



,, 6. Cuspidaria alceata, Hedley. 



„ 7, 8, 9, 10. Tnrqtteiia integra, Hedley — hinge, profile, exterior and 



interior. 



,, 11,12. Luci)ia iiidufa, Hedley — hinge and exterior. 



