what are these hubcap?

Per the '67 data book, Barracuda wheel covers - http://www.hamtramck-historical.com...DataBook/1967/CCI05152011_0008 (983x1280).jpg

Also optional on Valiant models - http://www.hamtramck-historical.com...ok/1967/67_3_Valiant_Features_Options0005.jpg

Also available on Valiant & Barracuda for '68.