SCOLECIDA. 



115 



follows this is really produced by a process of budding from the 

 head. The head contains no reproductive organs, and is not fur- 

 nished with a mouth or digestive organs of any liind, its nutrition 



Pig. T2.— A, Tcenia solium, of the natural size ; a " HeatI " or " nurse ; " & One of th« 

 proglottides from tlie sexually mature part of the -woriii. B, A single mature pro- 

 glottis of tlie same, showing the genital pore (p) and the branched uterus (u). 



being entirely effected by imbibition of the nutritive fluids elaborated 

 by its host. A nervous system, in the form of two ganglia, united 

 by a transver.Tie c.immisjure, a;id sending tilaments backwards, is 



