AVIAN CESTODES. 883 
tapeworms as I have known hitherto, often curled into a spiral or 
at least an undulating course, ave excessively slender as compared 
with the longitudinal muscles. In Otidiiceenia, however, we meet 
with the very surprising state of affairs represented in the annexed 
figure (text-fig. 11). Imbedded in the nucleated parenchyma 
are numerous scattered muscular fibres, which have a general 
Text-figure 11. 
Sagittal section through a portion of proglottid of Otiditenia ewpodotidis. 
1. Longitudinal, ¢. Transverse, d.v. Dorso-ventral muscles. 
m. Medullary layer. 
dorso-ventral direction and must be regarded as the dorso-ventral 
musculature. But the fibres themselves are distinctly of the 
character of the fibres of the longitudinal muscular layer. They 
are long, straight fibres of even diameter, and I traced them 
through the layer of cireular fibres which bounds the medullary 
