316 BUDDING AND GROWTH 



grows much larger in the course of the first day, attain- 

 ing to about ^^th rnch. It is of a lengthened pear-shape, 

 the larger end being the anterior. It moves evenly 

 and rather rapidly, by means of its cilia, which cover 

 the whole surface, but which are very minute. Its 

 appearance and motion greatly resemble those of a 

 Stefitor, when gliding moderately along through the 

 water. (Fig. 3.) 



One which I selected for examination glided freely 

 about on the surface of its glass prison for about a 

 day and a half; at the end of that time it took up its 

 position in one of the angles, and the next morning I 

 found that it had not moved again. But it had 

 undergone changes which I rightly siipposed to be 

 the first steps in the development of the polype. (See 

 fig. 4). The large end of the pyriform rests in the 

 angle ; the small end is become bulbous and is sepa- 

 rated from the body by a coustriction, and there is 

 another slighter constriction in the middle of the 

 body. The orange-colour is retiring from the cir- 

 cumference, especially from what appears to be the 

 budding bulb, the whole of which is pellucid white, a 

 little more translucent down its middle. 



Twelve hours afterwards, this buddiug extremity I 

 found produced into an indubitable tube of consi- 

 derable length (Fig. 5.), with glassy walls, one joint 

 already formed near the extremity, and the termina- 

 tion rounded. The contents were white and granular, 

 separated from the walls in the basal parts, but filhng 

 the whole interior near the tip. There was a clear 

 opening through the substance of the granular me- 

 dulla in one place, dividing off a portion of it into a 



