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The class of crustacea is divided into two sub-classes, Entomostraca and Malacostraca. The first, Entomostraca, contains the fairy-shrimps (Branchipus). A simple Crustacean, the fairy shrimp body is distinctly separated into head, thorax, and abdomen. This diagram shows parts of the fairy-shimp, (b) brood-pouch, (e,e') compound and simple eyes, (f) paddle-shaped feet, (h) tubular heart, and (i) intestine.

Fairy-shrimp

The class of crustacea is divided into two sub-classes, Entomostraca and Malacostraca. The first, Entomostraca,…