http://en.m.wiktionary.org/wiki/Appendix:Latin_first_declension

I only just discovered this.... apparently Greek loan words in the first declension singular play some tricks, -e remains instead of -a in the nomitive for example.

All the more reason for me now to build a time machine so I may travel back and punch a native latin speaker in the face. Ill just appear in their field while plowing, walk up to them in their stare of amazement, punch them in the face, and then walk back to the time machine, without saying a single word