The large list box in the Pageant main window lists the private keys that are currently loaded into Pageant. The list might look something like this:
ssh1 1024 22:c3:68:3b:09:41:36:c3:39:83:91:ae:71:b2:0f:04 k1
ssh-rsa 1023 74:63:08:82:95:75:e1:7c:33:31:bb:cb:00:c0:89:8b k2
For each key, the list box will tell you:
ssh1
(an RSA key for use with the SSH-1 protocol), ssh-rsa
(an RSA key for use with the SSH-2 protocol), or ssh-dss
(a DSA key for use with the SSH-2 protocol).
ssh-keygen
when applied to your authorized_keys
file.