Zoologischer Anzeiger 



herausgegeben 



von Prof. J. Victor CarUS in Leipzig. 

 Zugleich 



Organ der Deutschen Zoologischen Gesellschafi. 



Verlag von Willielm Engelmann in Leipzig. 



XXn. Band. 4. September 1899. No. 596. 



Inhalt: I. WiSBenschaftl. Mittheilnngen. 1. lUasteriuaii, On Ihe "Notochord" of Cepha- 

 lodiscus. (Schluß.) 2. Verlioefif, Neues über paläarktische GeopMliden. II. Mittheilungeii ans 

 Mnseen, Inotitnteu etc. l. Internationaler Zoologischer Congress. 2. Linneau Society of 

 New South Wales. III. Personal-Notizen. Vacat. Litteratnr p. 3S5-408. 



I. Wissenschaftliche Mittheilungen. 



1. On the "Notochord^' of Cephalodiscus. 



By A. T. Masterman, B.A., D.Sc. 

 (Schluß.) 



It is scarcely necessary to say that this pericardium is evidently 

 homologous with the proboscis-vesicle of Balatioglossus and hence the 

 comparison of the latter with the subneural gland of Cephalodiscus 

 will have to be given up. With Dr. Harmer's second formula as gi- 

 ven above I therefore now agree. 



The detailed relationship of the subneural sinus, pericardium, 

 and heart, and of the glomerulus I must leave to the fuller paper. 



(1) How will the above affect Dr. Harmer's first formula? In 

 my first paper reasons were given that the notochord of Cephalodiscus 

 would have its structure and relationships more appropriately indi- 

 cated by the term subneural gland, on account of its histological 

 structure, the presence of mucoid material in its lumen and its rela- 

 tionship to the central nerve ganglion and to the pharynx. Later 

 work (Trans. Roy. Soc. Edinb. Vol. XXXIX) led to a confirmation of 

 this view, as the organ in question proved to have a similar relation- 

 ship to a circum-pharyngeal system of grooves as is the case with the 

 subneural gland of the Tunicata. What then is the homologue of this 

 organ in Balanoglossus ? Labouring under the erroneous assumption 

 that the proboscis-vesicle of Balanoglossus was the homologue of the 

 distal extremity of the subneural gland of Cephalodiscus^ I formerly 

 sought for the vestige of the proximal end in the neighbourhood of 



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