I believe avenan has hit the nail on the head. The standard size tubes, long lugs and seat cluster are characteristics of the frame used on these two Peugeot models. The Shimano 105 components suggest it is a Galaxie.
Now for the bad news. Peugeot USA recalled both the Comete and Galaxie models, stating in part, "Due to apparent defects in the design or manufacture of these aluminum bicycles, the frame tubes may loosen inside the lugs." The models actually ended up being recalled twice. The first time they were repaired, but the fix was inadequate. The second time they were destroyed and replaced with a steel framed Triathlon model.
If you want a copy of the recall notice, send me a Private message with your e-mail address. I can also provide some detail pics of the bike so you can compare with what you have. Hopefully, I've erred in my identification.
Another forum member, MiamiJim, was directly involved with the recall and may have some further info.