476 MICHAEL F. GUYER, 



wbat more numerous aud arc crowded togethcr at iiitervals into band- 

 like luassos, appeariiig to form sheath - like structurcs around ihe 

 various internal organs. They persist in the neighborhood of the pore 

 biit seem to undergo no modification in structure. 



Excretory System. The excretory System does not diÖer 

 materially from that of T. saginata. In some of the very anterior 

 proglottids it is seen at four longitudinal vessels but thesc soon merge 

 into two, one on either side, which extend through the remainder of 

 the body (Fig. 3 l.e.c). The cauals are of larger size and near the 

 posterior edge of each segment are joined by a cross vessel (Fig. 3 

 t.e.c). They pass ventral to the genital diicts and between the general 

 inner field and the longitudinal nerves. 



Nervous System. On account of the condition of the material, 

 which was not suitable for working out histological detail, but little 

 can be said of the nervous System beyoud its location aud cross struc- 

 ture. Two main branches extend throughout the body along the outer 

 edge of the large longitudinal excretory canal (Fig. 3 l.n.s). They 

 do not exist as Single cords, except at the very anterior end but run 

 for the most part in Strands of throe and occasionally five (Figs. 4—6 

 l.n.s). Where three are present the middle one is usually cousider- 

 ably the largest. The Strands are for the most part more or less 

 oval in cross section but may spread out until they are almost baud- 

 like in appearance. In the neighborhood of the genital ducts they 

 separate, some going to one, and some to the other side of the same, 

 commonly two pass dorsal and one ventral to the ducts. The Strands 

 seem to have no distinct sheath of their own, but a sort of surrouud- 

 ing casc is formed by the muscles fibres. All are traversed aud 

 divided up into minute facets by a connective tissue network, They 

 are almost invariably larger and better developed on the same side 

 with the genital pore. 



Sexual Organs. In this form as in all other Cestodes, the 

 sexual Organs are well developed. They do not ditfer esseutially in 

 their genei'al plan of structure from those of T. solium or T. sagi- 

 nata but show many minor variations. 



Any one of the several more important of these would be almost 

 sufficient alone to show the specific rank of the new form. The pro- 

 glottids showing füll development of the sexual organs measure 4 mm 

 to 4.5 mm long by 3 5 mm wide in the headless worm, and about 

 4 mm long by 4.5 mm wide in the other; in the first case being 

 longer than broad aud in the secoud somewhat wider than long. In 



