- efferent branchial channel
- ejaculatory duct
- endite
- endognath
- endophragm
- endophragmal skeleton
- endopleurite
- endopod
- endosternite
- endostome
- epibranchial region
- epibranchial ridge
- epibranchial space
- epidermis
- epigastric region
- epimeral fold
- epimeral region
- epimeron
- epipod
- episternum
- epistome
- excretory pore
- exhalent passage
- exite
- exognath
- exopod
- eyestalk