No. 5.] THE CESTODE AfOXIEZIA EXPANSA. 245 



row may perhaps account for this difference in position in the 

 two sets of organs, for the line connecting the centers of the two 

 ovaries lies at right angles to the furrow separating them, and 

 the ovary of d' thus lies in a region where the segment d is 

 longer than it is in the region where the ovary would normally 

 appear. 



The relation of the furrows and genital organs at the left of 

 c and d requires little comment. The organs are normal in all 

 respects. The two partial furrows approach close to the edge, 

 but turn forward, becoming very slight, and soon disappear. 

 The pores are somewhat less than the normal distance apart, for 

 the furrows do not quite reach the edge. The curve forward of 

 the outer ends of the furrows apparently does not affect the 

 position of the genital organs, this portion of the furrows being 

 very shallow. 



Inter-proglottidal glands appear in all the partial furrows 

 except the one between c and d on the right, and their absence 

 in this part is undoubtedly connected with the slight develop- 

 ment of the furrow. 



Figure 22. 



In the series of segments shown here there are a number of 

 more or less incomplete furrows, and each is accompanied by 

 abnormalities in the genital organs. The figure is a view from 

 the ventral side. 



The two furrows between the segments a and b correspond 

 closely in position, except at the right, where the ventral furrow 

 turns forward just before reaching the edge and ends on the 

 ventral surface, but the dorsal furrow continues to the edge, 

 where it ends. At the left neither of these partial furrows 

 reaches the edge, though both end near it, the dorsal furrow 

 nearer than the ventral. The genital organs at the right of 

 these two segments, a and b, appear normal in form and position. 

 The ovaries are the normal distance apart, as might be expected 

 from the character of the furrows in the ovarian region. The 

 two pores are equidistant from the dorsal furrow between them. 

 At first glance the right pore in a appears to be quite close to 

 the anterior boundary of the segment, but it should be noted 



