Subgenus Scapharca Gray 1847 196 



A. {Scapharca) reinharti (Lowe) 1935 198 



A. {Scapharca) cumingiana (Nyst) 1848 200 



A. {Scapharca) biangulata (Sowerby) 1833 201 



A. {Scapharca) aviculaeformis (Nyst) 1848 202 



A. {Scapharca) emarginata (Sowerby) 1833 203 



A. {Scapharca) obesa (Sowerby) 1833 205 



Subgenus Cunearca Dall 1898 205 



A. {Cunearca) nux (Sowerby) 1833 205 



A. {Cunearca) aequatorialis (Orbigny) 1846 206 



Genus Lunarca Gray 1842 208 



Lunarca vespertina (Morch) 1861 209 



Lunarca sp 210 



Subfamily NOETIINAE Stewart 1930 210 



Genus Noetia Gray 1857 211 



Noetia reversa (Sowerby) 1833 211 



Genus Sheldonella Maury 1917 211 



Sheldonella delgada (Lowe) 1935 212 



List of material 213 



References 232 



Plates 1 1-16 237 



