PLATE 47. 



Fig. 78. Nervous system of Monieeia expansa, after Tower (1900). 



Fig. 79. Nervous system of Trielad; after Lang (1881). 



Fig. 80. G. nigrosetosa, Haswell (1902, pi. VII, fig. 1). 



Fig. 81. Same, egg, showiug operculum. Haswell (1902, pi. VII, 

 fig. 7). 



mil. br. comm. — anterior bridge commissun 1 . 



mil. gang. Ten. — anterior ganglion knot. 



ant. r. comm. — anterior ring commissure. 



dist. r. comm. — distal ring commissure. 



lul. loiitj. conn. — lateral longitudinal connective. 



long. n. st. — longitudinal nerve stem. 



ninl. long. conn. — median longitudinal connective. 



post. hr. comm. — posterior bridge commissure. 



post. gang. Ten. — posterior ganglion knot. 



proi. r. comm. — proximal ring commissure. 



r 4oo ) 



