17G 



COMPA RA TIVE A NA TOMY 



CHAP. Ill 



apertures of the water -vascular system. Such a segmented body 

 represents a simple Platode individual, not a Platode stock; it does 

 not arise by budding. Strobilation and segmentation are therefore 

 to be clearly kept apart. 



Literature. 



L. v. Graff. Monographic dcr Turbcllarien. I. Rhatidococlida;. Leipzig, 1882. 

 Arnold Lang. Die, Polydaden (Sccplanarien) des Golfes von Neapcl. (Fauna und 



Flora des Golfes von Neapol XL) Leipzig, 1884. 

 Is. Ijima. Ucber Bau tmd Entwickelung cler Sussivasserplanaricn (Tridaden). 



Zettschr. f. wissensch. Zoologie. 1885. 



R. Leuckart. Die Parasitcn des Menschen. 2d edition not yet completed. 

 Numerous treatises and works by Sieboldt, Leuckart, Pagenstecher, Ercolani, Vogt, 



M. Schultze, 0. Schmidt, Quatrefages, Hallez, v. Graft', Selenka, Gotte, Wagener, 



v. Beneden, Zeller, Braun, v. Kennel, Schauinsland, Thomas, Sommer, Landois 



Pintner, Kiichenmeister, Fraipont, Lang, etc. 



