Zoologischer Anzeiger 



herausgegeben 



von Prof. J. Yictor CaFUS in Leipzig. 



Zugleich 



Organ der Deutschen Zoologischen Gesellschaft. 



Verlag von Wilhelm Engelmann in Leipzig. 



XXVI. Band. 



27. October 1902. 



NO. 685. 



Inhalt: 



I. Wissenschaftliche Mittheilungen. 



1. Bitter, The Structure and Significance of 

 the Heart of the Enteropneusta. With 3 figs, 

 p. 1. 



2. Moroff, Chilodon cyprini nov. sp. (Mit 

 3 Figuren.) p. 5. 



3. Poche, Bemerkungen zu der Arbeit des Herrn 

 Basset-Smith : » A Systematic Description of 

 Parasitic Copepoda found on Fishes, with an 

 Enumeration of the known Species «. p. 8. 



4. Verhoeff, Über die Nerven des Metacephal- 



segmentes und die Insectenordnung Oothe- 

 caria. (Mit 9 Figuren.) p. 20. 

 5. zur Strassen , Zusatz zu meinem Artikel 

 über die Arcturiden. p. 31. 



II. Mittheilungen aus Museen, Instituten etc. 



Central-Ausschufs für die internationale 



Meeresforschung, p. 31. 



Corrigenda, p. 32. 



Litteratur. p. 1—24. 



L Wissenschaftliche Mittheilungen. 



1. The Structure and Significance of the Heart of the Enteropneusta. 



By Wm. E. Bitter. 

 (With 3 figs.) 



eingeg. 11. September 1902. 



In his recent preliminary account of the regeneration of the pro- 

 boscis in the Enteropneusta, C. Dawydoff 1 has reached conclusions 

 relative to the strncture and significance of the heart in this group of 

 animals that harmonize so well with my own results as to impel me 

 to present at this time a brief communication on the subject. The 

 author's conclusions may be summarized thus : 



1) The so-called »Herzblase« (Spenge 1) or »Pericardialblase« 

 arises as a. blind vesicle by abstriction from the co el o m in the dorsal 

 portion of the proboscis. 



2) The side of the vesicle wall turned towards the chorda inva- 

 ginates into the cavity of the vesicle to produce ultimately a blood 

 sinus which is the real heart. The outer primary vesicle should be 

 called the pericardium. 



3) The relations of the heart and pericardium are, then, similar to 

 those in the tunicate, "especially to those in Appendicularia". This 



1 Über die Begeneration der Eichel bei denEnteropneusten. ZooL Anz., 1902. 

 25. Bd. No. 677. p. 551. 



1 



