284 BULLETIN OF THE 



which can be found of the embryonic structure (b) is a tooth or spur which is 

 represented in hg. 8.* 



* It will be seen, if my account of the development of Glossocodon be compared 

 with Fritz Mailer's (op. cit.), that, while according to my account the peduncle (Stiel) 

 of the stomach appears long before the secondly formed otocysts, he represents them 

 both as developing at about the same time. It will also be seen that the four secon- 

 dary otocysts follow instead of precede the appearance of the long tentacles. Accord- 

 ing to him the otocysts, as the long tentacles, appear in pairs situated diametrically 

 opposite on the bell rim. No observations were made by us on this point. 



