SIZE OF HOOKS. 243 



Average size of the hook- sacs of Tamia solium : 



First series — In the middle, 0-025"' = 0-055 mill, j at 

 the base, 0018"' = 0-045 mill. ; at the opening, 

 0015'" = 005 mill. 

 Second series — In the middle, 002'" = 0'045 mill. ; 

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

 0-010'" = 0023 mill. 

 Size of the sucking discs in — ■ 



a. Tamia solium, 0-22'" = 0-498 mill, in length, 02'" = 

 - 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 0008" / = 

 002 mill, in diameter. 



Eggs of T solium, 0-016'" = 0-036 mill, in length, 0017'" = 

 0-039 mill, in breadth. 



Eggs of T. mediocanellala, 016'" = 0*036 mill, in length, 

 0013'" = 0-032 mill, in breadth. 



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

 T. mediocanellala, scarcely larger. 



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

 00328 mill, in diameter. 



