Forms the whole skull in Cyclostomata, Elasmobranchii and Holocephali.

软构成圆口纲,板鳃亚纲与全头鱼亚纲的整个的头盖。

On the rank that reachs mummy from cranium of trilobite, dinosaurian egg, pithecanthrope, crockery, remains, get through gives birth to the channel that is born not to cease.

从三叶虫、恐龙蛋、猿人头盖、、废墟及乃伊的,打通生生不息的隧道。