ANATOMY OF CESTODES. 



179 



bundle ; in other places one might reckon three in a dorso- 

 ventral row. So far as the more anterior proglottids are con- 

 cerned, I agree on the whole with Cohn's representation of the 

 facts. He is, I think, also correct in representing a rather 

 thin cortical layer, which is exceeded in diameter by the 



Lm 

 \ 



Text-figure 3. 



t.m. 



/ 



t.m. 



V.tr 



Part of a transverse section through an anterior proglottid of Amah ilia. 



l.m. Longitudinal muscle-bundles not forming everywhere a continuous layer, t.m. 

 Transverse muscles of dorsal and ventral sides of proglottid, v. Vagina. 

 v.t. Near to dorsal opening of vertical tube of water-vascular system ; the 

 tube is shown and the superficial depression which bears the. actual pore. 



medullary portion. I find, however, that the regularity of the 

 muscle-band is not absolute. In many sections (text-fig. 3) there 

 are gaps or intervals where the muscle-bundles are absent : these 

 are never large and, as a rule, the longitudinal muscular layer is 

 continuous. 



