Which preposition to use with conchas

on Occurrences 2%

" "I had a reason," declared Racey Dawson, threading a new rawhide string through one of the silver conchas on his split-ear bridle.

as Occurrences 1%

She returned their visit at Los Gatos, and there made the formal acquaintance of Don José's grandmother, a lady who still regarded the decrepit Concha as a giddy muchacha, and who herself glittered as with the phosphorescence of refined decay.

in Occurrences 1%

Pisces et conchae in montibus reperiuntur. 3038.

to Occurrences 1%

Waves of sound reach the ear, and are directed by the concha to the external passage, at the end of which they reach the tympanic membrane.

Which preposition to use with  conchas