560 ANNIE MATTHEWS. 



base of the polyp now was approximately 1 mm. in diameter. 

 The only food added to the water was a little Nitzschia from time to 

 time, but they were never seen taking it in. 



They lived healthily until April 3rd, — two months approximately, 

 but were then preserved, as flagellates had attacked them. 



This work is being continued and amplified, and it is hoped that a 

 complete account of the development of A. digitatum will soon be 

 forthcoming. 



