34 Pygmsea app. 



35 Amphidesma Roseum p. 44 



36 Corbula Quadrata app. 



37 Cummingia Coarctata app. 

 38 Tellinoides app. 



39 Corbula Trigona app. 



40 Solen ISiveus app. 



41 Cylindraceus app. 



42 Phillippinarum app. 



43 Corbula Mediterranea p. "47 



44 Amphidesma Pallidum p. 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 Rubrolineatump.44 



52 Decisum p. 44 



53 Saxicava Carditoides p. 51 

 54 Californica p. 51 



55 Verier upis Lajonkairii p. 55 



56 SanguinolariaNuttalii p. 56 



57 ■ Californica p. 56 



58 Venerupis Crenata p. 55 



59 Psammobia Pacifica p. 60 



60 Psammotaea Violacea p. 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 



1 1 Cyclas Similis p. 90 



12 Striatina p. 90 



13 Cyrena Violacea p. 92 



14 Bengal ensis p. 93 



15 Orientalis p. 92 



16 Cyclas Sarratoga p. 90 



17 Cytherea Mactroides p. 99 

 18 Trigonella p. 99 



