REPRODUCTION OF ORGANS. 159 



from the remainder, which measured about four inches. 

 The former was motionless, contracted, and seemed life- 

 less ; the latter moved freely. I put both into an old 

 aquarium. The long posterior portion glided about 

 among the stones for two days, exactly like a living 

 healthy animal ; the anterior part remained motionless 

 and contracted until the third day, when I saw it 

 also gliding over the stones in a most lively manner, 

 rearing its head, and feeling about in the manner of a 

 caterpillar. Eight days after its arrival, the head portion 

 was still active and apparently healthy, but the hinder 

 part had become motionless and was evidently dead. I 

 find no further record of the case, and probably the 

 anterior part ultimately died without reproduction ; but 

 the length of the period of its survival in apparent 

 vigour, renders it not improbable that in the open sea, 

 under the influence of abundant oxygen, and suitable 

 food, the wanting parts might have been renewed to the 

 fore-part, if not to both. 



To return to my more recent captive, however. I 

 killed it for cabinet preservation by putting it into 

 fresh water, where it presently died, with the noticeable 

 circumstance that it threw out mucus in such profu- 

 sion that the whole body was enveloped in a mass, 

 much thicker than itself, of clear jelly, excessively tough 

 and tenacious. 



