88 
1896) for other species, and referred to above in connection with 
Hym.enolej)is nana. 
Transverse fibers are comparatively few, and are prominent at all, 
only in the region where one segment joins the next. The dorso- 
ventral fibers are also more prominently developed near the junction of 
the segments. 
Fig. S2. — Pro^ l ttid of II. diminuta by transmitted light. Uterus developed and containing ova: ov., 
ovary; h, teste ■; ?d., uterus; ves. sein., rec. ^e»i.,vesicula seminalis and receptaculum seminis; v. ex. can., 
ventral lateral e.vcretory canal; y, g., yolk gland. Enlarged. (After Grassi, 18881. pi. 11, fig. 12.) 
V. ex. can. 
ves.sem. 
The rostellnm is supplied with longitudinal and circular libers, an 
outer longitudinal and inner circular (Zschokke. 18S9). In the scolex 
there are found muscle libers running in various directions, with 
various attachments. 
Excretoky system. — The excretory canals (tigs. 7-t, 82, 84, 88) are 
lateralh" situated. The ventral pair as usual are much the larger, a 4 id 
are connected in the posterior part 
of each segment l)v a transverse 
canal (tig. 84) of smaller caliber. 
The dorsal canals lie close to the 
dorsal side of the ventral canals, 
and are much smaller except in 
the scolex and the anterior part 
of the strobila where the ventral 
canals are of small diameter, only 
a little larger than the dorsal 
canals (tig. 74). In the scolex 
there is an anastomosis of the 
four canals behind the rostellnm. Extending forward from this anas- 
tomosis, there are two loops, one on either side of the rostellnm, into 
which also, the excretory system is extended by means of four very 
slender canals, which unite in the rostellnm to form two closed 
loops, the dorsal canal of each side uniting with the corresponding 
ventral canal. Similar loops, as found b}" Mingazzini (1899), in 
Hyrnenolepis nana have already been mentioned in connection with 
that form. 
Fig. 83. — Proglottid of H. diminuta further devel- 
oped than fig. 79: rec. sent., receptaculum seminis; 
t., remnants of testes; ut., uterus. Enlarged. 
(After Grassi, 18881, pi. 11, fig. 12.) 
