10 



41 Glauconome Curtus Nobis 



APP. 



42 Cyclas Appendiculata p. 91 



43 Lacustris p. 89 



44 Cinerea p. 91 



45 Fontinalis p. 90 



46 Nitida p. 90 



47 Obtusalis p. 90 



48 Partumeia p. 91 



49 Elegans p. 91 



50 Cyrena Turgida p. 93 



51 Sordida Nobis, app. 



52 Placens Nobis, app 



53 Oblonga p. 94 



54 Cyprinoides Quoy 



p. 93 



55 Rotundata p. 93 



56 Carolinensis p. 93 



57 Australis p. 94 



58 Woodiana p. 92 



59 Vanikorensis p. 94 



60 Philippinarun 



Nobis ait. 



PLATE XV. 



1 Cyrena Sumatrensis p. 94 



2 Tenebrosa app. 



3 Obesa app. 



4 Cyrenoidea Dupontia app. 



5 Cumingii app. 



6 Oblonga app. 



7 Cytberea Cor app 



8 Meretrix p. 96 



9 Petecbialis p. 96 



10 Zonaria p. 96 



1 1 Graphica p. 96 



12 Lilacina p. 98 



13 Tigrina p. 100 



14 Pannosa p. 105 



15 Argentina p. 105 



16 Bicolor p. 104 



17 Floridella p. 105 



18 Effossa p. 109 



19 Excavata p. 109 



20 Aurantia app. 



