Fig. 16. — Section of a portion of Graniia Idbyrinthica. (After Dendy.) . 



Showing the escape of the larva from the tissues of the mother sponge into the flagellated chamber 

 of the mother ; fl, flagellated chamber ; I, escaping larva ; o, opening of flagellated chamber into central 

 cavity (paragaster) of sponge. 



Fig. 17. — The Amphiblastula larva of Graniia lahyrinthica. (After Dendy.) 



n, flagellated cells ; gr, granular cells. 



40 



