250 GEORGE T. H ARC ITT. 



credit the universality of Lang's claims, even if they held true for 

 a few forms. 



Since this is the method of the formation of the tentacles, and of 

 buds in other regions of Gonionemus, we may safely assume that 

 .probably the same process would be active in the formation of 

 the bud from the tentacle, or at least to a great extent. Greater 

 support is given this assumption by the fact of the presence of 

 mitotically dividing nuclei found in the entoderm of the bud. 

 They were not definitely determined in the ectoderm though 

 doubtless present. 



I am glad to acknowledge my indebtedness to my father, C. 

 W. Hargitt, for permission to reproduce Fig. 2, which appeared 

 in his paper on " Variation among Hydromedusae," and also for 

 allowing me to examine his collections of Gonionemus. 



ZOOLOGICAL LABORATORY, SYRACUSE UNIVERSITY, 

 January 18, 1904. 



