The handle of the malleus, with the umbo at its tip, crosses the drum obliquely from the cone of light upward toward the short process.

对于处理锤骨的于与鼓膜脐穿过鼓间接从锥光向移动的短期进程.

Compared with the D-larvae and the umbo-larvae, the densities of the post larvae and the settled spats show rapid reductions at the end of the development process.

与D形与壳顶比，壳顶后期及附着稚贝的密度大幅下降。