removing creat an account text on main page

I'd like to remove the create an account text on the main page, leaving the login option in place..where can I find the text involved.
I'd like it to say just to log in. I'm using paypal for a subscription site, and as it stands now they can create an account without going thru paypal first, but on everything else the have to go thru paypal. I'd like to keep create an account active, just remove the link on the main page under the "welcome to" message.