KEPORT OF THE BUREAU OF ANIMAL INDUSTRY. 



181 



December 31. Lambs Nos. 106, 108, and 110 were put in a pen with Nos. Ill, 112, 

 113, and 115. And sheep Nos. 101 and 104 were put with Nos. 114, 116, 117, and 118. 

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

 contain no taeniae when examined, these changes had no result, and could not have 

 affected the result in other ways. 



The object of arranging and re-arranging these sheep was to give 

 possible chances of infection to the uninfected sheep. 



Table B is compiled from data obtained from lambs born in 1886; 

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

 Experimental Station in Washington, D. C., and from a few lambs 

 born in 1887. The sheep marked x, killed June /Jo, was also adult. 



Table B shows that the Tcenia fimbriata begins to appear in two 

 or two and a half months old lambs, that they continue 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 from May 15. 



Nos. 101 to 104 and M were adult sheep; all others were lambs. 

 Adult taenise contained embryo. 



POST MORTEM EXAMINATIONS. 



December 26. No. 105 died. It contained four small Tcenia fimbriata, the largest 

 about 26 cm long, and fifteen cysticerci of T. marginata, each less than l cm in longest 

 diameter. 



December 29. Killed No. 107. It contained nineteen small T. fimbriata, the 

 largest about 4 cm in length, and twenty cysticerci, the largest a little over l cm in di- 

 ameter. 



December 30. Killed No. 109. It contained over one hundred small taenise, rang- 

 ing from 5 mm to 10 cm in length; also a few small cysticerci; apparently of same age 

 us in 107. 



January 8. No. 108 died. It contained three specimens of Tcenia expansa ; one 



