I get those too, especially from hens new to laying. They're also called boof, wind, and cock eggs. (Old timers thought roosters laid them!) Mine almost never have a yolk.
You can see more of them, and some really funky looking eggs here: http://www.countrychickens.com/country_chickens_4_008.htm
Kathy, Bellville TX
You can see more of them, and some really funky looking eggs here: http://www.countrychickens.com/country_chickens_4_008.htm
Kathy, Bellville TX
