TAPEWORM FROM APTERYX. 83 



The Structure of the Rostellum in two New 

 Species of Tapeworm, from Apteryx. 



By 



IV. Blaxland Beiiliam, D.Sc, M.A., 



Professor of Biology iu the University of Otago, New Zeaiaud. 



With Plates 7 and 8. 



On the 11th November, 1898, I received from the Curator 

 of the Botanical Gardens the body of a young specimen of 

 Apteryx Bulleri, one of a lot recently purchased by the 

 Corporation of Dunedin, and placed in the public gardens of 

 the city. 



The intestine of the bird was literally crammed with para- 

 sites, the duodenum contained a great quantity of very small 

 Cestodes, measuring a sixteenth to an eighth of an inch in 

 length. Further down were a number of larger Cestodes of 

 another species, and measui'ing three or four inches in length. 



Still further down, and mixed with these, were a number 

 of large yellow Echinorhynchus, which occurred in still 

 larger quantities throughout the greater part of the intestine, 

 as far as the origin of the cseca. I counted more than 

 100 Echinorhynchus, and 150 of the larger Cestodes. 



In the gizzard were a number of Nematodes, measuring 

 about half an inch in length, as well as a number of small 

 isolated proglottids of some tapeworm. These appear to 

 belong to the small species occurring in the duodenum, where 

 also isolated proglottids occur, and their occurrence in the 

 gizzard must have been due to regurgitation. 



