Biologisches Centralblatt. 



Unter Mitwirkung von 

 Dr. K. Goebel und Dr. R. Hertwig 



Professor der Botanik Professor der Zoologie 



in München, 



herausgegeben von 



Dr. J. RosentJial 



Prof. der Physiologie in Erlangen. 



Vierundzwanzig Nummern bilden einen Band. Preis des Bandes 20 Mark 

 Zu beziehen durch alle Buchhandlungen und Postanstalten. 



Die Herren Mitarbeiter werden ersucht, alle Beiträge aus dem Gesamtgebiete der Botanik 

 an Herrn Prof. Dr. Goebel, München, Luisenstr. 27, Beiträge aus dein Gebiete der Zoologie, 

 vgl. Anatomie und Entwicklungsgeschichte an Herrn Prot. Dr. R. Hertwig. München, 

 alte Akademie, alle übrigen an Herrn Prof. Dr. Rosenthal, Erlangen, Physiolog. Institut 



einsenden zu wollen. 



Bd. XXIX. 15. Juni 1909. M lg. 



Inhalt: Dobell, The „Autogamy" of Bodo lacertae. — Buitendyk, Zur Physiologie der Urnen von 

 Sipunculus nudus. — Mordwilko, Über den Ursprung der Erscheinung von Zwischenwirten 

 bei den tierischen Parasiten. — Janicki, Über Kern und Kernteilung bei Entamoeba blatia- 

 Bütschli. — Meerwarth, Lebensbilder aus der Tierwelt. — Nagel, Handbuch der Physioe 

 logie des Mensehen. 



The „Autogamy" of Bodo lacertae. 



A reply to Dr. v. Prowazek. 



By C. C. Dobell. 



In a recent number of this Journal (XXVIII. Bd., Nr. 17), I 

 brought forward evidence to show that Dr. Prowazek's description 

 of „autogamy" in Bodo lacertae was exceedingly questionable — he 

 having probably taken stages in the development of a yeast for 

 stages in . the life-history of Bodo. As Dr. Prowazek has since 

 published (this Journal, Bd. XXIX, Nr. 1) a reply, perhaps I may 

 be permitted to point out here that he has done little — if anything - 

 to answer my objeetions. 



Dr. Prowazek makes the following Statements: 



He says he has been able to demonstrate „im Kurs" the same 

 processes, which he described in the cysts, in the free flagellates. 

 If by this Dr. Prowazek means that he was able to demon- 

 strate beyond question an autogamy in the free living 

 animal, then he has made a discovery of profound importance, 

 and it is to be hoped he will soon give us a complete description 

 of his work. For in this case all my objeetions are void. 



Dr. Prowazek then says that his fig. 67, PI. III is „nur ein 

 seltener Ausnahmefall" and repeats that „die sogen. Gametoid- 

 XXIX. 23 



