SIZE OF HOOKS. 243 



Average size of the hook- sacs of T&nia 



First series In the middle, 0-025'" = 0-055 mill. ; at 

 the base, 0-018'" = 0'045 mill. ; at the opening, 

 0-015'" =0-05 mill. 



Second series In the middle, 0'02'" = 0'045 mill.; 

 at the base, 0-010'" = 0-023 mill. ; at the opening, 

 0-010'" = 0-023 mill. 

 Size of the sucking discs in 



a. Tania solium, 0-22'" = 0-498 mill, in length, 0-2'" = 

 0-45 mill, in breadth. 



b. T. mediocanellata, 0-367'" = 0-829 mill, in length, 

 0-3'" = 0-678 mill, in breadth. 



The sucking discs of the Echinococci are scarcely 0-008'" = 

 02 mill, in diameter. 



Eggs of T. solium, 0-016'" = 0-036 mill, in length, 0-017'" = 

 0-039 mill, in breadth. 



Eggs of T. mediocanellata, 0016'" = 0-036 mill, in length, 

 0-013 //x = 0-032 mill, in breadth. 



Eggs of Tania from the Cape of Good Hope, just as in 

 T. mediocanellata, scarcely larger. 



Eggs of T. Echinoc. scolicip., 0-0145 F" = 0-0148 W"' = 

 0-03.28 mill, in diameter. 



