XVI 



.1 Swan Anadonta, 2 Littk Bird Hyna. 3 Painters' Unio. 4 Ambiguous Cas- 

 talia. 5 Toothed Trigonia. 6 Pearly NucuUt 7 Ram- horned Diceras. 8 I)eli- 

 cious Pectunculus. 9 Noah's Area. 10 Eared CucuUcea. 11 Heart Isocardia. 

 12 Striated Hiatella. 13 (?MVKea Cypricardia. 14 £c?z6/e Cardium. 15 /"wr- 

 rowerf Carrfrta. 16 iZec^ Zcwcea. 17 ImhHcated Venericardia. 18 Cosma Fe«M5 

 19 Hen Ortygia. '20 Rayed Galathm. 21 Chione Cytherea. 22 Islandic Cyprina 

 23 Orbicular Exoleta. 



