325 



with the anterior end of the marginal nerve in the following proglottis, 

 I have not been able to demonstrate any such connection. 



From the dorsal surface of the posterior lateral ganglion arises a 

 large nerve, which curves around the longitudinal excretory tube and 

 passes directly across the proglottis to join the corresponding part of 



Fig. 1. 



gn.ds 



Fig 2. 



coms.d. qn.d.dx. 



vaexc.t. 9^^P- 



•ua.'exc.lg. ; anus. ' 



Va.exc.t.'' conts.v. 



Figs. 1 and 2. coms.d. Dorsal commissure, coms.v. Ventral commissure, con't. 

 d.dx. Right dorsal connective, con't.d.s. Left dorsal connective, con't. d.-v. Dorso- 

 ventral connective, con't.v.dx. Right ventral connective, con't.v.s. Left ventral 

 connective, r/«. Gonopore. gn.d.dx. Right dorsal ganglion, gn.d.s. Left dorsal 

 ganglion, gn.l.a. Anterior lateral ganglion, gn.l.p. Posterior lateral ganglion. 

 gn.v.dx. Right ventral ganglion, gn.v.s. Left ventral ganglion. 7i.gen.ex. External 

 genital nerve, n.gen.i. Internal genital nerve, n.l. Lateral nerve, n.marg. Margi- 

 nal nerve, va.exc.lg. Longitudinal excretory tube, va.exc.t. Transverse excre- 

 tory tube. 



the posterior lateral ganglion of the opposite side of the body. This 

 I have called the dorsal commissure (Figs. 1, 2 coms.d.). A nerve 

 corresponding in size, position, and connections likewise unites the 

 ventral surfaces of the two posterior lateral ganglia. This I have called 



