476 Prof. F. J. Bell on Lumbrici with hifid Hinder Ends. 



exhibit the natural size of the worm, and the form it took 

 when moving at ease. It will be observed that the left 

 branch appears to be a little shorter than the right ; and at 



times this difference appeared to be better marked, so that 

 an observer would frequently remark that the left branch 

 looked like a bud. That it was not so was proved by this 

 one fact, that, as time went on, the difference in size became 

 more marked. 



For more than two months the worm was under my care, 

 and I sedulously attended and watched it. 



On August 21 it was still very lively, and for the first time 

 there were apparent some indications of a future clitellum, of 

 which as yet there had been no sign ; but even these were 

 still obscure. There was now a very definite difference be- 

 tween the left- and the right-hand branches, the former being 

 not only smaller but much less active. 



On the 25th of August Mr. Hesse (the taxidermist to the 

 Zoological Department, to whose charge I committed the worm 

 during an absence from London) observed that the creature 

 had lost its " tails," and on the 29th of August it was found 

 dead. 



On the 22nd of August Mr. Harting was kind enough to 

 hand to me an example of a " brandling " [Lumhricus foRtidus) 

 which had been forwarded to him by Mr, Eobert Service, of 



