portrait, nucleus

描述：

Echinamoeba (eck-eye-na-mee-ba), a genus of free-living amoebae believed to be related to Acanthamoeba. With a hyaline region from which emerge fine sub-pseudopodia. Nucleus with nucleolus and condensed heterochromatin on the inside face of the nuclear envelope evident at the base of the hyaline zone. The clear posterior vacuoles all fuse to form the contractile vacuole. Posteriorly with filaments which make up the uroid. Phase contrast.