THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[SIXTH SERIES.] 

 No. 30. JUNE 1890. 



LI. — On the Morphology and Phylogeny of the Organization 

 of the Cestoda. By C. Glaus *. 



Foe a number of years past I have represented in ray lectures 

 a view of the nature of the Cestode body which differs mate- 

 rially from that propounded by Steenstrup and strengthened 

 by the researches of von Siebold, van Beneden, and Rudolph 

 Leuckart : nevertheless the ensemble of the facts and the 

 results of numerous later investigations prove it to be the only 

 true and satisfactory one. The main features of this altered 

 view of the case, which, moreover, in many respects does not 

 differ so very widely from Hud. Leuckart's latest treatise on 

 the Helminthesf, are to be found briefly indicated in the latest 

 editions of my text-books \ ; but, so far as I am aware, a 

 more precise explanation of my theory on a directly compara- 

 tive basis has not yet been attempted. The following brief 

 account is intended to supply this deficiency. 



* Translated from the ' Arbeiten aus dem Zoologischen Institute der 

 Universitat "Wien und der Zoologischen Station in Triest,' Bd. viii. 

 Heft iii. : Alfred Holder, Vienna, 1889. 



t Rud. Leuckart, ' Die Parasiten des Menschen und die von ihnen 

 herriihrenden Krankheiten, Ein Hand- und Lehrbuch fur Naturforscher 

 und Aerzte,' Leipzig, 1879-188G, Bd. i. 



% C. Claus, ' Grundziige der Zoologie,' Marburg, 1879, IV. Aufl. Bd. i. 

 ii. Lieferung, p. 388 &c. ; ' Lehrbuch der Zoologie,' Illustrirte Ausgaben, 

 ii., iii., and iv. Aufl. 



Ann. & Mag. N. Hist. Ser. 6. Vol. v. 30 



