148 



ILLINOIS BIO LOGIC JEL MONOGRAPHS 



436] 



able that eggs pass out from the tapeworm into the alimentary canal of the 

 host and that in B. histiophorus the eggs pass freely out from each proglottis 

 and do not wait until the posterior proglottides break off to make their escape 

 from the parent." 



In the following table a number of important measurements of B. manu- 

 brifortnis, D. laciniatum and B. histiophorus are given for the sake of com- 

 parison; all dimensions are given in millimeters: 



D. laciniatum 



B. histiophorus 



B. manubriformis 



Max-imum length of strobila 



Maximum breadth of strobila 



Breadth at posterior end 



Length of scolex 



Breadth of terminal disc 



Breadth of scolex at middle 



Breadth at posterior end 



Breadth at constriction 



Depth of terminal disc 



Depth of scolex, middle 



Depth at posterior end 



Depth at constriction 



Length of first segm.ent 



Breadth of same anteriorly 



Breadth of same posteriorly 



Length of median segments 



Breadth of median segments 



Length of posterior segments 



Breadth of same 



Length of cirrus-sac 



Max. diameter of sam.e 



Length of vaginal sphincter 



Diameter of same 



Dimensions of eggs 



Dimensions of calcareous bodies 



Number of testes 



Diameter of ova in ovarian isthmus 



154 

 4 

 2 

 2 



0.8 

 0.4 

 0.6 

 0.25 

 0.5 

 0.55 

 0.35 

 0.25 

 0.7 

 0.3 

 0.65 

 0.3 

 0.3 

 1 



1.5 

 0.4 

 0.14 

 0.05 

 0.07 

 52x35m 

 17-24x8-14/1 



1.8 



0.4 



0.3 



0.16 ("ripe") 

 0.5 ("ripe") 



45x35m 



50-70 

 0.15 



220 



5 



2 



1.5-3.5 

 0.8-1.2 



0.64 



0.81 

 0.21-0.44 



0.89 

 0.90-1.05 



0.63 



0.58 



0.39 

 0.28-0.54 

 0.50-0.89 



1.0 



2.50 



0.50 



0.14 



0.05 



0.07 



58x34/x 



18-26x11-15m 



60-70 



0.15 



