35 Amphidesma Roseum p. 44 



36 Corbula Quadrata app. 



37 Cummingia Coarctata app. 



38 Tellinoides app. 



39 Corbula Trigona afp. 



40 Solen Niveus app. 



41 Cylindraceus app. 



42 Phillipinarum app. 



43 Corbula Mediterranea p. 47 



44 AmphidesmaPalliduinp.44 



45 Purpurascens p.44 



46 Punctatum p. 45 



47 Corbula Porcina p. 46 



48 Amphidesma Formosum 



p. 44 



49 Lenticulare p. 44 



50 Rupium p. 44. 



51 Rubrolineatum p.44 



52 Decisump. 44 



53 Saxicava Carditoides p. 51 



54 Californica p. 51 



55 Venerupis Lajonkairii p. 55 



56 SanguinolariaNuttaliip.56 



57 ' Californica p. 56 



58 Venerupis Crenatap.55 



59 Psammobia Pacifica p. 60 



60 Psamraotaea Violaceap. 60 



PLATE XIII. 



1 Tellina Margaritina p. 63 



2 Exilis p. 64 



3 Deltoidalis p. 70 



4 Lucina Pecten p. 77 



5 Lutea p. 77 



6 Digitalis p. 77 



7 Donax Columbella p. 80 



8 ■ Cayennensis p. 82 



9 Cardioides p. 82. 



10 Martinicensis p. 84 



11 Cyclas Similis p. 90 



12 ■ Striatina p. 90 



13 Cyrena Violacea p. 92 



14 ■ Bengalensis p. 93 



15 Orientalis p. 92 



16 Cyclas Sarratoga p. 90 



17 Cytherea Mactroides p. 99 



18 Trigonella p. 99 



