19 Character Generator (chargen)
31 MSG Authentication (msg-auth)
33 Display Support Protocol (dsp)
35 Printer
38 Route Access Protocol
39 Resource Location Protocol (rlp)
41 Graphics (graphics)
44 MPM FLAGS Protocol (mpm-flags)
45 Message Processing Module [recv] (mpm)
46 MPM [default send] (mpm-snd)
47 NI FTP (ni-ftp)
48 Digital Audit Daemon (auditd)
50 Remote Mail Checking Protocol (re-mail-ck)

I'll let someone else take over now, thanks to my dad for helping me with this list.