Nachdruck verboten. 



Uebrr setzungsrecht vorhehalten . 



Oll tlie structure of Taeiiia coiifusa Ward. 



By 

 Michael F. Gruyer, A. M. 



(Stiulies from tlic Zoological Laboratory, the University of Nebi'aska, 

 Lincoln, under the direction of Henry B. Ward, No. 27.) 



With Plate 28. 



The specimeiis representing the above naraed form were obtained 

 through a Lincoln physician ; the first one, in 1894, and the second 

 a year later. On account of the external appearance, which is notice- 

 ably different froni that of the two previously knowu human Taeniae, 

 Tacnia sagbmia and Tacnia solium, they were set aside for a raore 

 careful examination at some future time. The generally peculiar ap- 

 pearance of the body, the dissimilarity in internal structure, and the 

 extreraely niodified head preclude all possibility of classifying them 

 with either of the common forms. In view of these differences the 

 name Taenia confusa was proposed by Dr. Henry B. Ward, who 

 first recognised the specific rank of the form. He briefly mentioned 

 the same in the report of the Zoologist (Ward, 1896, p. 258) and 

 later, in the report for 1896 (Ward, 1897, p. 180—182) gives a fuller 

 i^cneral Statement in regard to it. The only other literature which 

 iL'fers to the new species is the report of the prelimiuary announce- 

 ment made before the Nebraska State Medical Society (Ward, 

 1896a). A systeniatic study of the form was taken up by me in 

 Sept. 1895 and has been carried on in connection with my studies on 

 other forms of Taenia to the present date [June 1897] '). 



The anatomy has been worked out about as thoroughly as the 



1) A i-eceut note referring to this species and to tbis paper is 

 Ward, 1897 a. 



Zool. Jahrb. XI. Abth. f. Syst. 32 



