ox A NEW HUMAN TAPE-WORM (BOTHUTOPEPHALUS SP). ;^79 



Moreover, the body of tlie present Bothriocephnlns species is 

 longitiulinalh' trnvei'scd ])y severni, more or less deep, furrows on l)oth 

 its ventrîd and dorsnl surfaces. These are few and insignificant on 

 sample No. 1. l)ut numerous on all other samples, in Avhidi the most 

 conspicuous are the two on either surface, that run almost iminter- 

 ruptedlv and piu'allel to each other along the double series (^f main 

 genital ducts, dividing the tape-worm hody into a middle and two 

 lateral longitudinal zones (see figs.). They are slightly nearer to each 

 (3ther than to either body-margin. They may attain the depth of 

 about 74 the thickness of the body and must plainly be constantly 

 present in fresh specimens. The same can hardly be asserted of 

 all other hnigitudinal furrows seen on the middle and lateral zones 

 above mentioned, which -are, as seen in alcoholic samples, of 

 quite variable depths and sharpness, often interrupted or losing 

 themselves in their course, and by no means definite in their number. 

 However, some 8-5 in the middle and some 5-7 in the lateral zone are 

 the usual numbers to be met with. 



As already indicated, there are, to each (true) proglottis, two 

 sets of genital openings, situated riglit and left and communicating 

 externall v at the l)ottom of the tAvo most conspicuous longitudinal 

 furnjws of the ventral surface (J>, h, figs. 5 and ()). Each set consists, 

 in antero-posterior succession, of a cirrus Çcir. 0., figs. 10 and 1:^), a 

 vaginal {vag. 0.) and an uterine (vt. 0.) o])ening, lying close to one 

 another. On account of their secluded position Avithin the longitu- 

 dinal furrow, they are usually not recognizable from the outside, but a 

 pit-like depression of the latter, associated with a short cross- furrow or 

 two, sufficiently marks their position and at the same time serves as 

 the index to distinguish the ventral from the dorsal surface. In many 

 proglottides of sample No. 4, the cirrus is externally visible as a minute 

 rounded protrusion, evidently the result of its ])artial evagination (fig. G). 



