Nachdruck verboten. 

 Übersetz un gsrecht vorbehalte n , 



Ün the structure of Taenia gigantea (Peters). 



By 



G. A. MacCallum, M. D. and W. G. MacCallum, M. D., New York. 



With 4 fignres in tbe text. 



Through the courtesy of Dr. W. R. Blair of tlie Bronx Zoolo- 

 gical Park, we have been eiiabled to study several segments of an 

 enormous taenia derived from a Javanese rhinoceros {Rhinoceros son- 

 daicus). These segments were part of the mass ,of the body of the 

 worm discharged in 1906. At that time about twenty feet of the 

 worm was found and some of it preserved. Since then the care- 

 takers of the animal, wliich is still alive and apparently well, have 

 observed no trace of any further segments. The head was not found. 

 It may, of course, have been discharged and lost in the straw with 

 which the animal's stall was littered. The rhinoceros was said to 

 have been rendered quite ill by the presence of this worm and lost 

 weight. 



The portions of the worm which were preserved apparently in 

 alcohol seem to have been derived from quite widely separated 

 parts, for some fragments are very much larger than others and 

 far more mature. These larger fragments measure about 6,5 cm to 

 7,5 cm in transverse diameter while the sm aller measure about 



Zool. Jahrb. XXXII. Abt. f. Syst. 27 



