474 MICHAEL F. GUYER, 



cell lies against the cuticula and, in luany cases, the other is seen 

 to be in direct continuity with the Single wavy muscle fibres which 

 extend down toward the middle of the proglottid. In niost cases, these 

 tibres pass on directly through the band of transverse muscle fibres, 

 but in some instances they seem to run into, and turning, becomes a 

 part of the same. 



The body parenchyma. The mass of the body within the 

 cuticula, as in all Cestodes, is made up largely of parenchymatous 

 tissue, which, inasmuch as it diüters in no way from that of the ordi- 

 nary fornis, will require no particular description. The whole mass 

 is divided by the transverse and longitudinal muscle fibres, according 

 to the usual mauner, into a cortical and middle layer, The middle 

 includes nearly all the organs of the proglottid, and the outer layer, 

 many muscle fibres and calcareous bodies so common to T. saginata. 

 The latter, however, are not so plentiful nor so large in this form, 

 measuring only up to 11 ^a in diameter. It was suggested that the 

 smaller size might be due to some particular stain used which had 

 partially disintegrated the bodies, but inasmuch as I have used a 

 great variety of stains and find little if any change in the size or 

 structure of these bodies in difterent preparations, I think the small- 

 uess of size can hardly be attributed to the action of the stains. 



Muscular system. As has been mentioned the muscular 

 System is much less powerful than that of T. saginata ; but all three 

 Systems of muscles, viz. longitudinal, transverse and sagittal, are 

 present (Fig. 4 Im, t.m, s.m). The layer of longitudinal muscles 

 is much the thickest of the three and the individual muscle fibres the 

 largest. 



They are of especially large size toward the inner edge of the 

 cortical layer and show a tendency to run in bundles; numbers of 

 these bundles lying side by side give the section a marked streaked 

 appearance. In most cases the bundles do not run in exactly straight 

 lines but take a more or less wavy course. Moreover they do not 

 stop at the euds of the proglottids and become attached to the walls, 

 but unquestionably, run on directly from onu proglottid to another 

 (Fig. 5 l.m). This, then, is very difierent from the structure found 

 in T. saginata, which, accordiug to Leuckart (1886, p. 293) has 

 certain spindle-shaped cells lying between the end of some of the 

 longitudinal fibres in the successive proglottids, connecting them 

 through the isthmus or neck ; the fibres themselves always terminating 

 at the end of the proglottid. In T. confusa no cells answering ta 



