Turbellarian

This is a diagram of a Turbellarian, showing the general arrangement of the nervous structures and one of the modes of occurrence of the excretory tubules, which in this case open seperately into the pharynx, on the ventral side of the animal. b., brain; e, eye-spots; ex, excretory canals consisting of a transverse portion passing from the mouth toward the dorsal side, and longitudinal tubes which branch into the capillary vessels terminating in f, the flame cells; lc., lateral nerve cords; m, mouth.

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