260 



DR. F. E. BEDDARD ON 



constrictor ; but I am not able to assert whether this is or is not 

 a local modification of the general longitudinal layer of the body. 

 The interior of the cirrus-sac is packed with a delicate fibrous 



Text-fiff. 53. 



sp.d. 



.i,. 



.< r' 



<s. 



Transverse section through a portion of a proglottid of Solenotania vijperis, showing 

 the cirrus-sac, c.s., which is seen to have no definite walls. In the interior 

 of the sac is shown the terminal wider part of the cirrus and three sections of 

 the narrower part of that tube. sp.d. Coiled region of sperm-duct. 



network, with elliptical or spherical interspaces, which seems to me 

 to present no differences from the general parenchyma of the 

 body. The cirrus increases in diameter towards the external 



