(cons 'zebra '( ))
yields list
(zebra)
.
(cons 'horse (cons 'zebra '( )))
yields list
(horse, zebra)
.
(cdr (cons 'horse (cons 'zebra '( ))))
yields list
(zebra)
(car (cdr (cons 'horse (cons 'zebra '( )))))
yields symbol
zebra