There is something I always wondered ... Since in most cases Lisp prefers prefixed notations, why are cons-cells written in the form (A . B), which is an infix-notation as far as I see. Of course, when parsing a list, and creating its data structure, this notation does not really make the situation more complicated, since you could just read the next symbol, and then - if its not the dot - push a new cons cell on the cdr of the current one and set its car to the symbol, and if the list ends set the cdr to nil, if its a dot, push it, and set the cdr to the value given after the dot. And I see that this notation is handy when specifying lists which do not end in nil, like in scheme's define-statements for arbitrary many additional arguments.
I dont consider this a bad thing, I just always wondered why we have an infix notation here, while avoiding it on vitally every other place. Has it some historical reasons?