Reverse zone delegation

[Spirovski Bozhidar]

I am trying to delegate the reverse zone 195.26.151.0 subnet mask
255.255.255.0
     to the server arthur.camelot.domain.net (subdomain
camelot.domain.net)
     on the master dns for domain domain.net in the named.conf I added a
zone file definition:
      zone "151.26.195.in-addr.arpa" in {
             type master;
             file "hosts151.rev";
     };
What what should the zone file contain to delegate the reverse zone?
Please explain with an example.