bruce:0:~/tmp $ type perl
perl is /usr/bin/perl
bruce:0:~/tmp $ ls -l /usr/bin/perl
-rwxr-xr-x   1 root  wheel  43444 Nov 16  2006 /usr/bin/perl
bruce:0:~/tmp $ perl -v

This is perl, v5.8.6 built for darwin-thread-multi-2level
(with 3 registered patches, see perl -V for more detail)