Fig. 4 in The plastic nervous system of Nemertodermatida

Fig. 4 Light microscopic differential interference contrast micrographs of Sterreria sp. a Overview of the living animal, showing its elongated body shape. The animal is slightly twisted and the posterior end viewed from the left lateral side. Note dorsal supraterminal male copulatory organ and adhesive plate. b Anterior end of the body showing frontal glands and brain cells. c Statocyst of a hard squeezed specimen with two statoliths