860 DR. F. E. BEDDARD ON 
rule there is no neck and segmentation begins immediately after 
the scolex. The scolex is rather small and the suckers are large 
in proportion, occupying most of the area of the scolex. There 
was no trace of any hooks whether related to a rostellum or upon 
the suckers. I ascertained this by transverse and longitudinal 
sections as well as by the examination of entire scolices mounted 
Text-figure 1. 
A. Head-end of an example of Rhabdometra cylindrica. 
B. Another and complete specimen of the same species. 
in glycerine. It is very important to be positive upon this point, 
since the difference between the genera habdometra and Paru- 
terina is practically entirely to be found in the absence in one and 
the presence in the other of a rostellum armed with hooks. The 
strobila consists of proglottids, which are at first narrow and then 
