106 



December 29.— Killed No. 107. It contained nineteen small T. finibnata, the largest 

 about 4"^'" in length, and twenty eijstioerci, the largest a little over 1"^™ in diameter. 



December 30.— Killed No. 109. It contained over one hundred small Uenice, ranging 

 from 5""" to 10=™ in length ; also a few small ci/sttcerci, apparently of same ago as in 

 107. 



Januarys. — No. 108 died. It contained three specimens of Tania expansa ; one of 

 these was adult ; many small T. fimbriala, varying l^'" to 7=" long ; also six cystioerci, 

 somewhat larger than the earlier found. 



April 20. — Killed No. 106. It contained many T.fimhriata, over twenty-five in all, 

 which were over 7"" in length; none were smaller. Tlie duodenum and gall ducts 

 were packed. None were adult. 



May 7. — Killed No. 110. It contained one adnlt T. fimbriata and several cysticerci. 



March 14. — Killed No. 103. It contained from fifty to sixty tainia from 7'='" to 10'=") in 

 ength ; four of these were in the gall ducts and were among the largest in size. Tw- 

 niw immature to adult. 



March 29. — Killed No. 101. Found twnia: in duodenum, gall ducts, and pancreatic 

 ducts. The gall ducts were engorged ; the liver smaller than normal. The tcenicB 

 ranged in size from 7'^™ to W^"^ ; three were adult. There wore three cysticerci. 



April 28. — Killed No. 104. Found five twnitc from 2'^'" to 4':'!' in length, but no ci/sti- 

 cerci. 



April 28. — Killed No. 102. Fonnd fifteen Ueniai. The largest were not over 7"=™ in 

 length, and immature. There were two csi/ticcrci. 



Table O is made up from data, obtained from the six lambs, Nos. 

 105 to 110, inclusive, transported from the prairies to Washington. It 

 shows the comparatively slow growth of the parasite; also the abun- 

 dant infection of some of the animals so long as they were exposed to 

 infection. It also presents either the possibility of infection after they 

 were taken from the prairie or the retention of the embryo in the rumen 

 through a considerable time. 



C. 



October 15, the date on -wUioli tlie lambs wore taken from tho prairie and coirallod. 

 December 1, tho date on wluoh tho Iambs wore received in Waakington. 

 December 31, tho date on which the adults. Nos. 101 to 104, were removed. 



Lambs K and I, Table B, show that the twnia was developed to a 

 length of 2''"' in less than ten or twelve weeks, for the number of tceniw 

 found shows a slight infection and some time may have elapsed after 

 the birth of the lamb before its infection. 



Lambs A to I, Table B, show that in from twenty-three to twenty- 

 eight weeks the tcenia may develop to 8 or 10"™ in length, and that the 



