176 COMPARATIVE ANATOMY chap, iii 



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. Graflf. HoiuygrajiMe der Turlellaricn. I. SliahdocoeUdce. Leipzig, 1882. 

 Arnold Lang, Die Polydaden {Secplanarien) des Golfes von JS^eapel. (Fauna und 



Flora des Golfes von Neapel XI.) Leipzig, 1884. 

 Is. Ijima. Ueher Bau und Entivickelung der Silsswasserplanaricn (Tricladen). 



Zeitsehr. f, wissensch. Zoologie. 1885. 

 R. Leuckart. Die Parasiten des MenscAen. 2d edition not yet completed. 

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



JI. Schultze, 0. Schmidt, Quatrefages, Hallez, v. Graff, Selenka, Gotte, Wagener, 



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



Pintner, Kiichenmeister, Fraipont, Lang, etc. 



