Iviii 



INTRODUCTION. 



of the reddish-brown colour imparted to the stomach- 

 wall at a later period by the biliary glands, whilst the 



Fig. xxiii. 



Fig. xxiv. 



Fig. xxv. 



B. Brown body. bd. Bud. ov. Ovary. /. Funiculus. pol. 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 my 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 f. I shall confine myself now to stating very briefly 

 how these observations are affected, in my judgment, by 



* These three figures represent the supposed budding of the polypide 

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

 sule," loc. cit. 



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

 this point ; but in a letter recently received from him he says (after ex- 

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

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

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

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

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

 the germ-capsules, I have seen the bud of tl^e new digestive cnnal either 

 inclosed in them or protruding out of them." 



