Iviii 



INTRODUCTION. 



of the reddish-brown colour imparted to the stomach- 

 Avall at a Later period by the biliary glands^ whilst the 



Fitr. xxiii. 



Fig. xxiv. 



Fig. XXV. 



dd.A 



M- 



B. Brown body. bd. Bud. ov. Ovary. /. Funiculus. xmI. Polypide 

 supposed to be developed from the brown body *. 



former, being (according to my view) a growth out of the 

 brown body, possess it from the first. 



Unfortunately I have been unable to repeat ray ob- 

 servations to any extent with the help of the new lights 

 which later researches have cast on the subject; much 

 less have I had the opportunity of doing so under the 

 favourable conditions supplied by the modern Zoological 

 Station t- I shall confine myself now to stating very briefly" 

 how these observations are aflPected, in my judgment, by 



* These three figures represent the supiDoscd budding of the polypido 

 from the brown body, and are copied from my paper on the " germ-cap- 

 sule," lov. cit. 



t Prof. Smitt has not made any addition to his early observations on 

 this i^oint ; but in a letter recently received from him he says (after e,\- 

 plaiuing that he had not entered into the latest researches), " Still I retain 

 my standing-point, because it seems to me impossible to interjiret the ob- 

 servations in another way. I have followed the formation of the germ- 

 capsules out of the histolyzed digestive canal. I have prepared them out 

 of their connexion with the funicular plexus ; and after thus making loose 

 tlie germ-capsules, I have seen the bud of the new digestive canal either 

 inclosed in them or protruding out of thcni." 



