Markings under head? Is this normal?

I got these 2 baby normal balls and I noticed something interesting in their pattern on the underside of their heads. On both sides, they have a line that starts from underneath their eyes and goes along their jaw to the back part of their head. I took pictures so you can see. Has anyone else seen it before? If not, I think these two would be cool to dinker around with when they group up!

The girl:
http://i301.photobucket.com/albums/n...2/IMG_5778.jpg

http://i301.photobucket.com/albums/n...2/IMG_7812.jpg

The boy:
http://i301.photobucket.com/albums/n...2/IMG_2456.jpg

http://i301.photobucket.com/albums/n...2/IMG_5003.jpg

My normal girl and one of my pastels has markings like yours do. Pretty cool.

Hmm...can't say I've really paid much attention, but I would say so ?

Perfectly normal, especially for a Normal :)

I've seen it before.

Not a lot of snakes have it, and it is cool. My husbands Spider has those too.

Gale

Thanks, these guys are the first normals I've really dealt with normals other than my het albino boy and he doesn't have any of those markings. Thats what I get for not being around normals often :p

Yep my black pastel had similar marks And me fire has small lines and a dot at the back of his jaw on both sides. ( thanks for reminding me I gotta get some pics of that.)