105 



December 17. — Fed Nos. 105, 107, and 109 with proglottides of T. expansa from Nos. 

 Ill and 113. 



December 31. — Lambs Nos. 106, 103, and 110 were put in a pen with Nos. Ill, 112, 

 113, and 115. And «heep Nos. 101 and 104 were put with Nos. 114, IKi, 117, and 118. 

 Later on some other changes were made, but as the Eastern sheep were found to con- 

 iaiu no tamia', when examined, these changes had no result, and could not have 

 affected the result in other ways. 



The object of arranging and rearranging these sheep was to give 

 possible chances of infection to the nninfected sheep. 



Table B is compiled from data obtained from lambs born in 188G ; 

 from four wethers, which, with six of the lambs, were removed to the 

 experimental station in Washington, D. C, and from a few lambs 

 born in 1887. The sheep marked M, killed June 25, was also adult. 



Table B shows that the Twnia jimhriata begins to appear in two or 

 two and a half mouths old lambs, that they contiuue throughout the 

 winter and gradually attain maturity as spring approaches. Each of 

 the tables, A and B, shows that adult tape-worms were to be found 

 throughout the year. 



B. 



*The age is that of the lambs and is estimated May 15. 



Xos. 101 to 104 and M were adult sheep ; 

 Adnlt famiw contained embryo. 



all others were lambs. 



Fost-mortem examinations — December ?iG. — No. 105 died. It contaiued four small 

 Tamiafimbriala, the largest abont 2'='" long, and fifteen cysticerci of T. marginata, each 

 less than V"^ in longest diameter. 



