14 



Brans. 



the pharynx to a series of (apparently) 23 transversely 

 concentrated ventral-chain ganglia. The first of these 

 (tnboMophageal ganglion ) i> of some size and represents 

 the four anterior ganglia of the chain ; the following 21 are 

 simple rounded masnofl, situated segmentally, and cadi 

 :ig off two pairs of nerves to the body- walls of its seg- 

 ment. The terminal ganglion is a compound structure like 

 the first, and represents a longitudinal concentration of at 

 7 pairs of ganglia ; it supplies the anal sucker. The 

 post-oral ganglia are united to one another by 

 three connectives a lateral pair similar to those of other 

 worms and a delicate median ventral cord (nerve of Faivre) 



Fig. 9. 



M. 



N F. 



Tmamnt section through the Wntrnl-chain Connectives of Hinido 



medicinali*. x 200. 



B& Iflood-cpttv nectivea. M. Muscle-fibres. N.F. Nerve 



of Fait re. NL 1 , NL '. Th. two neurilemma-eheaths. P.O. Piir- 

 - 8. Septa. 



' - " tbe MlboBtOphageal ganglion and extends 



it the length of ih. obaifl : it is lost in the dorsal 

 part* of each ganglion (figs, t) and 10). 



Each simple port-oral a consists of a laterally 



paired maw of neuroj.il.-. im.Me.l on its lateral and ventral 

 svrfacliv iinijM,l., r p:m^linn-e..lN <,r diflerent sixes. Two 

 <>f these at tho anterior e,,<i of the ventral surface of each 

 ganglion are of colossal proportions (-1 mm. diam.), and 

 contribute fibres to the lateral nerves of the same side. 



