Quite nice poems, I hope you keep it up. ^^
Here's my feedback, I hope to give Jazztastic a run for his money when giving feedback.
When writing short poems (<12 Lines or two stanzas.), try to keep all of the stanzas with either one rhyme scheme or all free verse. You began rhyming, yet then stop. Generally this is used with larger stanzas at their end for emphasis, yet with only four lines it creates a rhyme scheme of a/a/b/c, which is half free verse and half perfect rhyme.
I hope you increase the length of "Prehistoric Texas". The first line was very, very good yet its scheme changed too dramatically for my taste.
I think its a sprouting seed at the moment, I hope you nurture it into a blooming tree.
"The Mundusphage" I already gave you my opinions on, I think its very very good and I hope you continue you work. :)