102 REDFERN, ON FLUSTRELLA HISPIDA. | 
in a paper in the eighth volume of the‘ Annals and Magazine of 
Natural History,’ that I can add nothing to his account of it. 
I regret that I was not aware of the existence of this paper 
until after my opportunity of observing the creature had 
passed away. Mr. Hincks says :—“ Imperceptibly the body 
of the polype shapes itself within the mass. The tentacles . 
are first visible.* Soon violent convulsive movements are 
seen within. The front part of the cell is frequently pushed 
out with much apparent force, so as to form a neck of con- 
siderable length, and then suddenly retracted. There is no 
appearance of an opening at this time. The tentacles become 
very restless, and bend themselves about as if trying their 
powers, and impatient of confinement. Gradually the parts 
become more defined ; the elongation and retraction of the 
fore part of the cell contimue, and, at length, the polype 
breaks from its captivity.” 
On the fifteenth day, the polypide protruded fully, and its. 
tentacles expanded freely. The wall of its cell was beauti- 
fully transparent, and admitted a full examination of the 
viscera, now receiving the alimentary matters. On the 
seventeenth day, the drawings 19 and 20 were made. In the 
state of protrusion, the lophophore and anus were carried 
outwards, and the alimentary canal stretched, owing to the 
stomach being drawn but little away from the bottom of the 
cell, whilst the other parts were shifted extensively. Ciliary 
motion was distinct on all the parts on which it is observed 
on the adult polypide. In the state of retraction, the qua- 
drangular state of the aperture of the cell was distinctly ob- 
served ; the tentacles were folded somewhat spirally upon 
each other; the cesophageal end of the stomach was drawn 
down to the bottom and side of the cell, and the pyloric end 
folded over it, the pyloric orifice being carried towards the 
same side, together with the dilated commencement of the 
intestine, which was laid parallel to the pyloric end of the 
stomach, and directly across the direction of the cell. 
Some appearance of the formation of a gemma occurred on 
the wall of this second cell, as in fig. 20, but it became no 
further developed, and the second polypide itself was found 
dead on the twenty-seventh day of its existence, to my very 
great regret. 
* When I first saw the striated mass beneath the surface of the gemma 
I supposed that it was the early stage of the formation of the tentacles, but 
I subsequently found that they formed beneath it, and that they were not 
distinct until after the body of the polypide had assumed the decided form 
of a bent tube. 
